I've managed to install Jas Tiger 10.4.8 base system on my PC. Now i want to install Leopard as my previous tries weren't so successful.

I've tried many distros of Leopard like: iAtkos v5i, Kalyway 10.5.2, ideneb v1.4, LawLess PPC, Leo4all v3, Leo4all v4.1 etc. They all have the same problem. When I boot from the DVD and start loading it restarts the PC automatically thus cannot see the apple logo and get to the installer.

I have also tried JAS 10.5.4 and successfuly passed that issue but it gets me an error: "Still waiting for root device".

Can anyone help me on how can i install Leopard on my system.
Thanks for your help!

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MOBO: Aopen n250a-FR nforce3 series
CPU: AMD Sempron 2600+
RAM: 1GB (DDR 400)
GRAPHICS: PNY 6200 256MB (AGP 8x)
LAN: On-board Gigabit Ethernet
AUDIO: On-board Realtek
DRIVES:
WD 120GB (SATA )
Samsung 500GB (SATA II)