LOL!! That would be hilarious! Yea, I am not sure why you would want to do this unless it is a really old mac and you want to make it look newer. I am sure that taking the parts from an old mac and putting them in a case is fairly easy. However, if anyone out there has done this would you mind posting a mod guide for our members. As easy as it may be for one, it may be difficult for another. This would be really great.
"Fix it 'til it Breaks."

Jacob - EiC & Director of Technology
Mac Pro Quad 2.66 - 4GB RAM
160 GB SATA RAID 1 - 650 GB Storage
Quad 19" Widescreen LCDs
Accessorized to the Hilt