Ah...your story sounds so familiar.
I started off with both Oblivion, and Fallout 3 on the PS3, but I started to get jealous of all the mods, so what do I do? I get a PC so I can play it on there
I'm not really one to be able to help with the technical problems, but if you're looking for mods to download then I can suggest a few, which are AWESOME, in my opinion anyway. Just head over to the Fallout Nexus and search for their Names
1) FOSE (Fallout Script Editor) - Basically it just improves the game, plus a LOT of mods need this to work.
2) Pipboy PDA (Readus) - This turns the Pipboy into a PDA. Lets you have the FULL outfit you are wearing, rather than cutting off a bit for the pipboy, plus its FAR more eyepleasing.
3) Underground Hideout - By far one of my favourite mods. Basically it just adds a small underground Vault (with a sidequest to gain access). There are weapon walls which you put weapons on, a nice little display area for them as well. Then there are mannequins you can dress up. Great fun
4) MotherShip Crew - Ever finished Mothership Zeta? Wish you could do more with it? Well then this mod is for you
Download it, and get a whole startship under your command
5) Oasis Safe Water - The first time I went to Oasis, because it was all green I thought the water would be safe. Well with this mod it is
6) Better Family - Basically changes the family to make them look like real vampires
7) Hair Pack - This adds in the hair for the Better Family Mod...rather than having it appear as though its been done in paint
Well, thats all the ones I have
I hope you have fun on Fallout on the PC