first off, get rid of ubuntu and grub, as chameleon is easier. Then keep the same partitions (or change them if you want) and find the way you want to install OS X. I would recommend iAtkos v7, but you may want to use something else.

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SportsGuy
Dell Studio Desktop 540
Intel Core 2 Quad 2.83 GHz Q9550 (All cores work)
EVGA nVidia GeForce 9500 GT (1GB) (Works)
M-Audio Fast Track Ultra Sound (Works)
Realtek Ethernet (Works)
8 GB DDR2 RAM (Of course works)
24" Dell 1920x1080 16:9 Monitor
Tri Boot with Snow Leopard 10.6.3 (64-bit) and Vista (64-bit) and Linux Mint