Big, huge thanks go out to Christian for helping me out on this. He was great and walked me through what needed to be done. I'm now up to 85GB which should hold me for a while

Thanks also to John for the jumper, which I did end up putting on the IBM to make it the slave - just in case.
I now have the room to reencode my MP3s at a higher bitrate. I'll have to find a time to start that project...
Thanks again everyone! It was a scary process and I don't think I'll try it again until I've found a second empeg for a backup. Still, I'm glad I did it.