well yeah, all I did, (cause I had mine unlocked, but it wouldn't read it on the second channel) was put it on the first channel with it set to master I think(don't remember if it was on cable select or not. you might try master first and then cs) then boot your pc up with only the xbox drive in(not your pc drive). You are basically using your bootdisk(xp or regular bootdisk works fine. I made mine under the standard "make bootdisk" feature in xp) to format your xbhdd. If I remember, I had to look it up to make sure, yeah I think it was the fdisk command. I used the help command to figure it out. You should be able to quick format it, and then when you reboot it with your pc hdd in and your xbhdd in, you should be able to use your mmc to set the settings just the way you want them. I don't think I'm leaving anything out. It should work.
I hope all this works for you.