Rashiki

You need two identical drives for RAID to function properly. Raid 0 is also referred to as 'striping'. This is where your data gets split between the two drives for faster read times. It also says you care very little about your data, since if one drive fails, you lose half the data and hence your system.

If you're going to go RAID 0, you had better be backing up your entire system every day in preperation for the day the drives fail.

Most people suggest running a single disk off of the raid array to do backups, as it will get pretty tedious with DVDs.

As for setting it up, it would depend on what kind of motherboard you have. Some boards come with raid controllers on board, and others (read: older) boards don't, and you'd need an add-in card for it to work.

Hard drives are cheap nowadays, and if your budget is strict, you could maybe go with two smaller drives if you want the performance boost.