Hey when I open fallout3 it says. "Failed to initialize renderer. Your display doesn't support the selected resolution. Please set a different resolution in fallout 3 display settings" And it says I have a Intel G33/G31 Express Chip set family? Its a new computer with vista, and I'm not a nerd so I don't know a lot about computers.
I had a similar issue with my computer, set your desktop resalution to a lower level 1028x890(or there abouts) should make it so you don't get that error. 1260x978 is too large for Fallout to operate without issues in, I don't personally know why it matters but it was what fixed the game for me.