b>7. How do I setup/partition a level 0 RAID array, and install my OS on it?</b>
The easy way:
1) Attach the drives to the RAID controller. Each drive should be master on its own channel (separate cable) for maximum performance.
2) Enter the RAID controller bios (usually you press CTRL+H after powering on the PC). Setup the RAID0 array with your preferred stripesize. The exact way of doing this depends on the controller. Note: Some controllers (e.g. the Promise-lite) does not allow you to change the stripesize.
3) Make sure you have a floppy with the RAID drivers. Boot from the OS installation CD, and when prompted press 'F6' to install third party RAID or SCSI drivers. Insert the floppy.
4) Using the installation program partition and format the drive.
5) Proceed with installing the OS on the boot partition.
http://www.tomshardware.com/forum/43125-32-raid