I finally managed to register here after having some issues with the sign in process, but anyway..
I think I have found a fix to all the freezing on the Game of the Year version of Fallout 3 and was told by another poster (JMarz) over on Gamefaqs that I should post it here also, as it seems to have helped out other players. The full thread can be found here:
http://www.gamefaqs.com/boards/960609-fallout-3-game-of-the-year-edition/55637913
I hope I am allowed to post that.
Anyway... I will copy and paste my initial post I made and this has helped me have a smooth experience with the game, whereas before, it was freezing, slowing down majorly and more or less unplayable. Here is what I did:
Okay, so I deleted my game data and reloaded my last save earlier. I was right outside Big Town after doing the quest there, and every single time I tried making my way to Paradise Falls, the game would freeze along the way, annoying the hell out of me.
So... everytime this happened, I deleted the game data and started again from Big Town. Same deal... it would freeze on the way to Paradise Falls.
Now... I understand the game is installing in the background, so I did something different this time. Read on...
Once sitting outside Big Town, I noticed that the noise of installing (Where you hear the loading going on, on the PS3) eventually stopped. It would only start up again if I moved from my position and started exploring the wastes (Or opened the pip boy). So... the game is installing as and when you come to a different area etc it seemed.
If you press start and stay on the pause screen, you can hear the constant loading sound (The game installing). I assumed this meant the game would FULLY install on the pause screen, rather than install along the way when playing, so I waited on that screen. You could hear it installing constantly, whereas leaving the pause screen and going back to my idle position would seem to stop the installing until I moved on somewhere else.
I stayed on the pause screen until the noise of installing stopped completely (About 30 mins. Another poster left it about 45 mins).
After that, everything was fine. It seems like the game has now fully installed and I can get to where I want, and everything feels better.
I think the problem may lie in playing the game when it is installing in the background. I think it's best to stay on the pause screen and leave it fully install before doing anything at all. It seems to be working for me.
Anyway, hope all that made sense lol. So far so good for me at the moment
Since doing this, I have had a great experience with the Game of the year version, even The Pitt was running smoothly for me.
So... delete the game data, start up the game, load your last save, and then when it has loaded, press pause and STAY on the pause screen until the installing fully finishes (You won't hear the noise anymore). Game runs fine then
Hope this helps you good people over here also.
Cheers.