By mail folder, I just mean a folder of mail within the Entourage interface. Inbox, Sent Items, My Work 2009, etc. If you drag one of those logical folders to the desktop, it will create an mbox file of it.
If you set Entourage to work offline, will it stop freezing so you can archive? I inferred from your earlier post that it froze during checking mail.
I'd also just try the profile/db on another machine in case it's something obscure on this specific Mac outside of the db or anything else you've checked. Prob the easiest thing to rule out before mucking with folder-level archiving.
