Hard Drive setup

I'm looking for a bit of help here on the best way to set up my mac pro. I have 3 Seagate 1tb drives and the stock 320gb drive installed in my system. I currently have Windows installed on the 320gb drive which I very rarely use. I have 1 1tb drive setup as my boot disk with all of my data on it. Another 1tb drive is currently used as a time machine backup of the boot disk. I just purchased and installed a 3rd 1tb drive but am trying to find out the best possible way to set things up. My intention is to slowly convert my DVDs in to digital format and store them on my mac pro. Aside from a media station I do a bit of gaming and tinker with final cut and photoshop. Any recommendations on the best way to set up these drive? I have read a bit about raid 0 and understand that improves performance and seems like a good option. If so, is it possible to set up raid 0 without redoing everything that I currently have on my first disk? Any advice is appreciated.

 

I guess my setup is similar to what you have if I were to turn my new drive in to a media drive and just move my photos, music, and movies over. Do I need to do anything to tell Itunes and Front Row to look for the data on that drive? Also, what do you have time machine backing up? Just the boot drive or can time machine backup multiple drives? Thanks for the help.