Asus X51RL Laptop "Waiting on Root Device"

[reaper7]

Have the following:

Motherboard Name Asus X51RL Series Notebook
CPU Type Mobile DualCore Intel Pentium T2330, 1600 MHz (12 x 133)
Motherboard Chipset ATI Radeon Xpress 1100
3D Accelerator ATI Radeon Xpress 200M/1100M (RC410M/RC415)
Audio Adapter Realtek ALC660 @ ATI SB600 - High Definition Audio Controller
Optical Drive MATSHITA DVD-RAM UJ-850S ATA Device
Disk Drive ST9120822AS ATA Device (120 GB, 5400 RPM, SATA)
Network Adapter Atheros AR5007EG Wireless Network Adapter
Network Adapter Realtek RTL8139/810x Family Fast Ethernet NIC

But getting the dreaded Root Device error, have tried iPC OSx 10.5.6 PPF4 pattched with ppf5 and ppfv1.1 with no luck.
Are the above specs compatible?