see my post <b><a href="http://forum.insanelymac.com/index.php?showtopic=80834&st=0&p=595576&#entry5955 76">here</a></b>. its a set by step and should help you if you are having trouble and have a similar system.

my specs.
Dell Inspiron 531 Hacintosh
Athlon64x2 4000+ @ 2.1Ghz
NVIDIA GeForce 6150 SE (MCP61/nForce430 kext change from MeDevil)
3GB DDR2 SDRAM @667MHz
250GB S-ATA @7200 rpm
160GB S-ATA @7200 rpm (Zephyroth-10.5.1 installed)
CDRW/DVD & DVDRW - SATA
500GB external USB-IDE @7200 rpm
250GB external USB-IDE @5400 rpm
120GB external USB 2.5" @5400 rpm (TuB-10.4.10 installed)

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