The first versions were compatible with FO1.
You can read the following in the readme.txt included in sfall1:
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sfall, a fallout 1 and 2 engine tweak mod by Timeslip (
http://timeslip.chorrol.com)
version 1.18e, built for fallout 1 v1.2 US.
This was a quick fallout mod which I originally stuck together to try and fix a few minor annoyances that I had with the games, but which has since turned into a slightly bigger mod which fixes some other peoples annoyances too. The main features are:
* Increase movement and combat speed to up to 10x normal.
* Play fallout in a window or in 16 bit colour mode
* Use d3d9 in place of the usual ddraw
* Use the mouse scroll wheel in the inventory, barter, conversation and save/load menus.
* Assign a use to the middle mouse button, and adjust mouse sensitivity beyond fallouts normal range
* Adjust or remove the 13 year time limit
* Fixes the broken pathfinder and sharpshooter perks
* Adds some additional script functions for modders to use
This mod only works with certain versions of the fallout exe's. For fallout 2, a US copy of 1.02 is required, although tweaked copies such as the version with megamod 2 also work. For fallout 1, a US copy of 1.2 is required, and you must use the windows version. (i.e. 'falloutw.exe'). Attempting to use this mod with an incompatible version of fallout will result in an error every time you run it, or if using the DOS version of fallout 1 the mod will simply have no effect. If you're version of fallout doesn't have kids, then you have the UK version instead of the US version, so you'll need to patch it into the US version before using this mod.
Using a d3d9 graphics mode obviously requires you to have dx9 installed and a dx9 compatible graphics card. sfall requires the DX9.0c August 2006 update. If you set the graphics mode to 5 or 6 but don't have DX9.0c installed, fallout will crash on startup. If you have a version of DX9.0c older than August 2006, fallout will crash at the main menu.
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The resolution patch doesn't add the option to change game speed, for example (I always use this to make battles faster). Sfall1 is still useful, believe me (or not).
Just to show you that I'm not imagining things:
http://www.gog.com/forum/fallout_series/sfall_in_fallout_1/post4 http://www.gog.com/forum/fallout_series/sfall_in_fallout_1/post7