Hi all, I have a 667 PB with 512 MB memory and 30GB drive. My Ti drive is almost full and memory tight with heavy Photoshop, iMovie use. What are my best, most reliable options for drive and memory upgrade to avoid buying new PB (brand, size, speed)? Will these upgrades cause cooling problems? Am I safe to do exchange myself? Thanks Cliff Hume Seattle, WA Ti PB 667 Dual 1.8 G5 17" iMac G4 --