QUOTE(hortonjunk @ Oct 3 2007, 01:34 PM)

In other words, I don't have a Windows PC (only a Macintosh),
Your mac may be able to access and lock an IDE drive, but I know little about macs. You could pick up any old PC, and use it to lock/setup an xbox drive (I would think a Pentium1 should work, pick one up for cheap)
QUOTE
I do have a softmodded xbox...
A softmodded box doesn't help you unless you need a way to get an exploit onto a mem card.
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install & format the 40 gb drive (using evoX booted from a CD and sending Raw FTP commands from my Mac), restore the data, and be able to both play xbox games and run linux?
You can't boot a burned/homebrew program without a mod, and an empty xbox hard drive does not make a modded xbox. If you were able to boot a CD, you should just use Slayers or AID to format.
If you have no way to access a xbox hard drive, you should read up on TSOP flashing, you need an exploitable game, a mem card, a modded xbox, (very) basic soldering ability and a computer to FTP.