unless you plan on installing an intel processor in that machine, you won't be dual booting.
But, I would love to see some macosx86project.org action. Just remember that Apple does not allow the installation of Mac OS X on non apple hardware, AND, you def need to buy Mac OS X.
good luck.
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"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