ok, so, on my Dell Dimension 8400, i installed leopard successfully, and upon finally finding out how to make the partition active, i booted to the familiar apple loading screen, but then it all goes black, no signal. seems like a display driver? i am using Kalyway 10.5.2, and the specs are as follows:

Dell Dimension 8400
Pentium 4 3.0 GHz with HT
DVD/CD read drive
DVD Burner
160 GB SATA
1GB RAM
ATI x300 128MB VRAM (i think)

I need to know what to do, any suggestions?!?!