the side panels have little clips on the inside in the middle that help hold them on and the insides have to be out to get at them. trust me, if there was an easier way I would have done it. you need the service manual for when you get a bit stumped. I have it in .pdf format if you need.

andrew, thanks for the compliments. enjoy your new mac and the mod. smile
Mac mini C2D 1.83GHz - 2GB RAM - 200GB 7200rpm HD
Sawtooth w/G4 1GHz - 1GB RAM - SIIG SATA w/2x1TB HD
B&W w/G4 600MHz - 1GB RAM - 2x80GB HD
Sawtooth G4 400MHz - 512MB RAM - 40GB HD
Dell Ultrasharp 2007WFP 20" Widescreen LCD
2.94TB Total Storage