Out of nowhere came this: http://www.ttlg.com/forums/showthread.php?t=140085  A new fan patch for Thief 2 & System Shock 2, that makes a massive upgrade to the games. 

A small sample of changes and fixes

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Renderer:
- Added windowed mode
- Added single display mode option - no resolution change between menus and game
- Added ingame support for all common resolutions, including widescreen
- Added support for 32-bit color
- Textures can now be automatically promoted to 32-bit, improving quality and effectively eliminating the palette limit
- Added UI framerate cap option to avoid GPU fan spinning up in UI
- Added DDS/PNG image support
- Added full 24/32-bit TGA/BMP image support
- Increased the maximum number of frames allowed in animated textures from 20 to 99, and increased the allowable filename length for animated textures (before the underscore) to support more than 7
- Animated texture rate can now be specified via a material file for that texture
- Fixed a bug where Transparency property didn't (correctly) apply on objects that contain transparent polys

General:
- Replaced video player lib with an FFMpeg based one to play cutscenes. LGVid.ax or other codecs are no longer required
- Option to use OpenAL (if available) instead of DirectSound. Includes support for audio effects in Windows 7 without an EAX-enabled driver (e.g. ALchemy)
- Added "head_bob" config var to control amount of head bob
- Added mousewheel support to options menu
- Fixed player ground contact tracking when walking off an object (caused footstep sounds to get "stuck" on previous material)
- Fixed sound cap per schema type bug and upped max sound channels to 48
- Changed screenshot output format to BMP and also added support for PNG screenshots
- Changed mouselook sensitivity to be resolution independent
- Added check to avoid trying to open files with reserved system name like com ports
- AIs now breathe from their head instead of their stomachs. They will no longer drown when up to their waist in water.
- Lowered player crouch height by a tiny fraction so he's less likely to get stuck on 4 unit tall spaces
- Added better support for binding actions to the mouse wheel (can bind wheel up and wheel down as separate actions, with modifier key support)
- Fixed star rendering
- Added "log_player_pos" command that dumps current player pos to log file (when enabled)
- Added the ability to detach from ladders by crouching
- Improved mantling a bit and added optional new mantling algorithm with lower failure rate
- Fixed a bug which limited number of sound channels to 16 even if more were selected
- Fixed a bug that sometimes caused doors to float away into infinity
- Fixed (or at least greatly improved) a bug with edge triggered OBBs sometimes failing to detect collision (in particular for slow moving objects)
- Fixed framerate dependent speed issue for camvators/moving terrain (with collision type: none)
- Added "fixed_star_size" option for resolution independent star size
- Fixed some bugs when attaching to a ladder from water.
- AIs who are facing very close to a wall will no longer turn to face south when the game begins
- Health bar drawing adjusted in widescreen
- Added option to fix arm rendering
- Added AA to rendering of loadout screen items
- Fixed pickpocket count bug that would always show 1 more maximum pickpocket than there actually was.
- Added "Blocks frobs" property, allowing objects to block frobs of objects behind them (e.g. to stop frobbing items through safe doors)
- Added option to left-align map notes text
- Made navigation of map/objectives screen a little bit more in-game friendly (screen can also be closed with space, arrow key navigation and return to switch map/obj)

DromEd:
- Lightmaps are now properly displayed in the editor 3D view
- Added support for HW rendering in editor viewports
- Increased the maximum number of visible on-screen terrain polies from 1024 to 20480
- Increased the maximum number of visible on-screen objects from 128 to 1280
- Added some safety checks to object scaling operations to prevent objects with 1.#INF scale
- Fixed a crash when computing pathfinding with an improperly linked moving terrain object in the mission. An ignorable assert is thrown and the object is skipped gracefully instead of crashing.
- Prevented a crash if you apply a model of one creature type to an object assigned a different creature type
- Fixed "Attempt to mark from invalid room id 0" assertion to actually show the room id that is invalid, instead of always showing 0.
- Integrated csgmerge tool into editor exe
- Added support for 32-bit lightmaps
- Fixed the bug where cloning a multibrush with particles would duplicate every object in the mission
- Fixed a bug where the game would crash when deleting a large multibrush
- Added fallback check to find Motiondb.bin in resource paths
- Fixed resource lock errors when loading TGA images (for object textures and distance art)
- Fixed solo view editor issues when going back to edit mode from game mode
- Added ability to change the brush colors in DromEd via values in DromEd.cfg.
- Added light-based transparency property
- Added ability to enable/disable eye zoom in Thief 2
- Vast improvements to editor dialogs, including crash fixes and improved functionality
- Increased brush limit from 7068 to 16384
- Increased rooms limit from 1024 to 4096
- Increased ambient sound limit from 256 to 1024
- Increased cell limit from 28672 to 32760
- Increased the maximum number of sides in a cylinder from 10 to 26.
- Increased automap location limit from 64 to 256 locations per page
- The texture rotation control can now interpret negative values
- Fixed a crash while generating reports
- Added a warning dialog when attempting to save one filetype (mis/gam/cow) as another
- Added new Windows-style texture palette (which also supports more than 256 textures)
- Added support for all editor window sizes
- Added Pendulum (/sinusoidal) curve type to tweqs
- Added DetailAttachement link type
- Added Distance Alpha property
- Added Bitmap Color property for custom modulation color on bitmap objects
- Added "Face camera (axial)" setting to Bitmap Worldspace
- Added color param, additive blending and spotlight cone falloff support to coronas
- Added "Editor Comments" property
- Added "show_vhots" command for debug visuals of vhot placement and numbering on objects
- Manually deleting links in the link view dialog no longer deletes attached object for ParticleAttachement/DetailAttachement links
- Added the ability to place graphical decals on book pages
- Corpses with Contains links no longer count as pickpockets
- The Auto-Multibrush property no longer crashes DromEd if the .vbr file was not found.
- The stimulus on existing receptrons can now be changed
- The intensity for sources is no longer reset when changing the propagator
- The receptrons list now correctly shows the max intensity value for existing receptrons
- Meshes can now be scaled with the Scale property
- Scaled objects now cast properly scaled shadows
- Objects can now obscure coronas
- Bitmap Worldspace objects can now be locally lit
- Precipitation will now collide with OBB objects as well as terrain
- The brush_to_room command can now be given a negative number, to be interpreted as an absolute size instead of a percentage (e.g. brush_to_room -0.1 would create a room brush 0.1 units larger than the selected brush.)
- It is no longer necessary to explicitly add the Hidden property to a secret object for the secret to be properly counted
- Added numeric keypad input support
- DromEd will no longer stop working after 03:14:07 on Tuesday, 19 January 2038
- Added "scroll here" option to the right-click menu for solo views, similar to the "teleport camera" option for non-solo views
- Fixed some issues with calculating which room cells are in (which might have caused problems with precipitation and fogging)
- Increased the time range of Tweqs to 0-65535
- The same property can no longer be added to an object multiple times
- Fixed a crash when adding the Texture Anim Data property to a concrete object

- See the included modders_notes.txt for more details on editor changes