Leo4all worked really good for me, in fact i kind of regret switching to iPC.

also try removing some of your RAM (like have 1 x 2GB), and then putting it in if you get OSX to install successfully.

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MOBO: HP M8100n AMD Media Center TV PC
OS: 10.5.8 (Updated from iPC OSX86)
Kernel: 9.8.0 Voodoo Kernel
Processor: Athlon 64 X2 with Dual Core technology
MotherBoard: MCP61
Graphics: nVidia 9600gt 512 mb
Audio: Realtek ALC888: Digital Output
Chipset: Apple nForce ATA
Ethernet: MCP61 LAN (Realtek RTL8201N)