Hi there again.
My Kalyway Hackintosh worked just fine with my old 7600GT, but my 7600GT died because of... playing fallout 3.

Anyway: I had to buy a new graphics card, and it's a GeForce 9800GTX+.
But... Guess what. Leopard refuses to boot. It stays in the apple boot screen forever.
When in text-boot mode, it stops somewhere around the NVinject part.

I have Read/Write access to my Mac partition on my Vista, so if any of ya got any tricks up their sleeves to revive a Leopard after a graphics card exchange, then I'm ready to try it all.

Remove your old graphics kexts. Find out what you need and then install it

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CPU: Intel Pentium Dual E2140 1.6 GHz. Graphics: Intel(R) 82945G (128 MB). Board: Asus P5GC-TVM/S Chipset: Intel Lakeport-G i945GC. HDD: 232 Gb S-ATA Samsung
Version 10.6.2 32bit. Kernel: Vanilla. Audio: VoodooHDA 0.2.2 with prefpane. Video: Stock GMA. PS2 fix: VoodooPS2
USB 2 not working

Acer Aspire 4530-6823
CPU: AMD Athlon™ X2 QL-62 2.0GHz. Graphics: Integrated GeForce® 9100M G. Chipset: nForce® MCP77MH.