Is there a good program to package a group of files into multiple rar files?

Like name.rar01, name.rar02 etc

I need to back up my music library off site but the hosting site I use has a 2GB limit, so I'll have to do it incrementally. Any suggestions? I'm assuming iTunes isn't going to back up local media that I haven't purchased on iTunes.

Any alternative backup services will work too, the file is around 20GB compressed. Thanks.

 

Thanks for the pointers. I would honestly have liked to do this, but the upload service I'm using is a-drive and it seems java doesn't play well with Safari 6 and the directory upload service. Maybe I'll try firefox before I resort to this.

 

Thanks for all the helpful replies guys. I suppose I should have just updated Java to begin with. All is well now, but I will keep this in mind if I need to do anything like this in the future. As of now I'm using Unrarx, I'll try to grab a more full featured application.