Corrupt RAR File, How To Recover?

So I have a 30-part RAR file as part of a collection I am trying to download, a few of the rar parts have files in them that are corrupted. Mostly large movie files. Is there anyway to recover it?

Downloading a 30-part series takes a considerable amount of time, any way to check?

@milton:

Here you go:
http://www.google.com/search?btnG=1&pws=0&q=RAR+Recovery

Cheers!

While unpacking, winrar will tell you which parts are damaged. Note those down.
Click on the damaged part inside of Winrar program.
Then go to Tools >>> Repair archive in menu (or just Alt + R).
It will repair archive by creating new repaired file and give it a different name.

I would say about 95% of times it repaired files for me.
But there's still chance that file in unrepairable state. Only way to beat this is to download a damaged part again.