You are talking about .RAR files, correct?
Our stock reply since we opened was that we didn't want to provide support for people trying to un-RAR files or deal with missing files in a series of multi-part .RAR files. Also, we didn't want people to use .RAR files to get around the old upload limits that we no longer have.
This topic keeps coming up, so it must be worth looking at the idea again. Our members are a smart and supportive group. I'm sure everyone could help each other out if we still ran into support problems with .RAR files.
Perhaps we can try testing this out in the video forums in January. Let me get some feedback from the other moderators first.
Thanks,