Rats, i didn't have this set up to notify me of your response. Sorry for the delay.
I've come across a lot of articles on how to install XP to a USB drive. Even from a Mac (http://www.xlr8yourm...706.html#S20998
). There a few ways to approach it, and all of them may require some experimentation, but it seems remotely possible. If i end up finding out (the hard way) that i can't get it to work, i'll do an internal installation. But for that i need to make sure i know how to make the XP OS save everything to an external, since i barely have room on my internal HD as it is (if anyone has tips or articles on how to do that please let me know).
That lack of room is why i want to put XP and a RAID mirror on the external. Why would i want to limit myself to 45 GB mirrored internally? If the drive dies, i wouldn't be able to recover either of them as easily as i would with to separate drives.
Anyway, here's the current status:
I have formatted my external drive into the 3 partitions i talked about. OSX's Disk Utility can format a DOS format, for which it uses FAT. You just have to change the "options" to "master boot record" to enable that. So i have a 20 GB FAT partition as well as my storage partition and RAID partition (which i have not yet set up in an array).
I've continued to do research and am currently planning on using a leopard macbook (just in case having bootcamp available becomes helpful) to just directly install XP to that external partition. I understand that if i boot the macbook with the XP disc in it while holding "C" i will be able to start the installation and select which drive i want (this stuff i've mostly found out from articles on installing XP to a USB drive). If that doesn't work i might either make a .iso of the leopard mac on the storage partition of my external drive, as it seems that bootcamp will only partition/install on local drives, so if i'm booting from an external with partitions, i hope that it'll recognize the other partitions. That, or i can try doing the installation simply with the internal HD of the macbook removed (which i understand is really easy with the new ones).
I know it's a lot, but are there any thoughts on any of this? Thanks!