My new mac pro is arriving in a couple days and I need help with hard drive configuration. I've only had a notebook prior to this, so I don't know what I need. I ordered the standard config MP. I will be using it for pro photo editing and occasionally making high-def photo slide shows on DVD. Also, I'll be adding RAM for a total of 6GB. Software used: Photoshop CS3, Illustrator, InDesign, Bridge, Dreamweaver, Flash, iDVD Questions: 1) Do I need a scratch disk even though CS3 uses RAM above 4GB for scratch? If so, what size/speed? 2) Is Time Machine worth using considering I archive my photos on external HD & DVD? If so, what HD should I get for it? 3) Are there any other uses for the internal drives I should consider? I only want to spend what I really need to improve performance. I'm not interested in filling all 4 bays just because they're there. Thanks for your help!