While trying to migrate one of my final accounts via cPanel, I ended up running out of disk space on the old server. It, for some reason, built a 400+ part archive of the files that ended up using like 40% of my hard drive. I have no idea why the archives ended up taking so much more space, but I obviously can't use the cPanel method.
Since I am using cPanel on the new server, however, is there a way to migrate the accounts (perhaps by manually tarballing the folders) so that they'll be configured to use cPanel accounts on the new box?