Hi! You can't use Windows-only mods on DOS though. If you want to use them, you need F1DP:
https://www.nma-fallout.com/threads/f1dp-fallout-1-dos-patcher.221053. It's a patcher with all the Windows mods ported to the DOS version. You can't use sFall or High-Res Patch or the Fallout Fixt EXE patches (Sduibek made a few on the EXE) - you can with this patcher. Use it and edit F1DPATCH.INI instead (read the readme, it's all explained there and also in the beginning of the INI file - though if you need anything, just say) - those settings will only be used on the DOS version though (keep that file and ddraw.ini with the same settings if you use the game both on DOS and Windows mode so that you don't have differences while playing in both modes - or at least many differences, since I didn't port all everything).
Ah he was just having a bad time, we got fine after it in PMs. All fine, no worries!
He did still say he thought it's kind of pointless, like I was told by some devs, because of Et Tu being able to run Fallout 1 with Fallout 2's engine and with Windows on DOSBox. But still, aside from me loving the project ahah, my tablet is too slow and already lags a bit running the game alone... Don't fully imagine how it would be with Windows+Fallout. So I still did it anyway. Maybe someone else could find it useful for whatever reason (slow device, maybe purist person wanting original Fallout 1 without Fo2's engine, no idea). Good a few found it useful so far! (100 downloads on version 1.2 on GitHub) Was worth the time! Aside from being useful for a few people, I learned a lot by doing this. Really cool.