OK, haha, then I'll write something else here, if a newbie will google it, it will come in handy.
I had one specific crash in Vault 15. Both with FixT and pure F1 and any patched version I tried. If my character put leather jacket (found in the locker there) on, the game would start crashing whenever I tried to perform "take" action. You need to climb the rope to get out of the vault, so I was stuck. Opening any other lockers crashed the game, too. But if I put the leather jacket off her, everything went back to normal. *puzzled shrug*
As for "rainbow graphics" on modern Windows, there's a simple solution. Right click on main workplace screen, select "screen resolution" and just leave it at that while playing the game. For some reason that magically fixes the game's graphics.
There are lots of issues with F1 on modern Windows, notably these rainbow colors, black screens and crashes. I first installed Fallout FixT without additional mods, and it helped, however, it led to game crashing all the time, until I couldn't proceed anymore. I installed "pure" F1 once more and played it, and it was fine, no crashes, except the one with leather armor mentioned above. And I found out that savegames from FixT 1.3.5. don't work with Fallout without FixT even if it's patched to unofficial 1.3.5. And I have to say that FiXT doesn't really make the game look all that much better anyway.
Oh, btw, so far playing a weak (STR3) character is both amusing and annoying. She can't equip most weapons, even guns require STR above it, so there are only two guns she can use, the starting gun and mauser for which bullets are pretty rare. Choosing not to tag "small guns" was a mistake, she is bad at shooting, and sneaking (tagged instead of it) is useless so far. But that's fine, because Ian is killing everything, my character is just standing around, often with knife in hand just in case.
But I don't know if that's ok to beat the game, she'll probably have to fight eventually.
I guess I'd say don't be like me and hope for manuals to raise untagged skills. Because when I actually got to see how much money they were worth, I knew it was hopeless to count on them. With timelimit, it's not really feasible to hope to buy all the books you need. Or even half of them. Or the third part.
Is there a way to remove timelimit from the game? I think 120 days that are left now should be enough and the premise of the game warrants a timelimit, but I don't like feeling rushed in an open-world game.