Seeing as this topic isn't tooo old... Currently trying to troubleshoot my crash problems(Crashes in exteriors, was fine for awhile, then happened way too frequently again). I am using a mod named "Duke Patricks Safe Save". I wonder if it could be the culprit of the crashes, but if it isn't then... Get it. It is sort of an auto-save mod with some fine scripts to prevent corrupted saves. And for such a crash happy game as Oblivion, these safe saves really save you sometimes, as you never need to replay more than 10-15 minutes of gameplay, no matter what you do. That's pretty neat.