I have the GoTY edition of Fallout 3. I installed it and tried to install ToTW (I have the Steam Ultimate edition of NV). ToTW gave an error for version, and I realized I had not updated FO3 to 1.7. So I downloaded the patch but it breaks my FO3 every... single... time. This is an unmoddified, unedited GoTY disc FO3 install crashing on startup after installing 1.7...
What can I do if I need 1.7 to play ToTW?