You have to download it: Kazaa Lite tools. You also need Virtual dub mod.

Does the Vdub MP3 give you any framenumber at which it crashes???
If so, you have to open the videofile agian and manually try to figure out what section is corrupted. If you have the first corrupted frame, you just start from the end of the movie and look for frames that are corrupt according to Vbdub MP3. This way you have the range of the corrupted frames.
After this, you startup Vdub Mod, load up the movie and go to the corrupted frames. First go to the first frame, tap the keyframe back button a couple of times, and write down the position of the slider in MB's. Next go to the last frame, tap the keyframe forward button a couple of times and write down the position in MB's again. Now you know what part in MB of the videofile is corrupt. With these values you can go to Kazaa Corruption fixer. I trust you can figure out how to use this program yourself, because the manual of this program is pretty straightforward.

However if you don't understand it, you can alwayscome back here and I'll explain it to you.

Greetz, D!mensio_x.