Mod a MDD


i recently purchased a PowerMac G4 MDD 1GHz 768MB RAM 120GB HDD Tiger installed. I want to install a HDD Activity LED and at some point i want to replace the white Power LED with a nice blue or purple LED and i was wondering if any of you can give me tips as far as the easiest way to do this.

Im sorry if this is in the wrong section of the forums i have not been on here in a long time.