Sounds like your SB600 is not supported by the iPC disc. Odd, because I could have sworn that SBxxx support was added to this distro?
OK, try booting with -v -x -F and see what you get.

---

Custom Hackintosh...AMD Athlon X2 5000+ (2.6 GHz) on GA-MA78GM-S2H...Linksys WMP300n Wireless...ALC889a sound...ATI HD 3650 PCIe...1 GB DDR2 RAM...320GB Western Digital SATA + 200GB Seagate IDE HDD...Rosewill DVD-RW IDE...Running Kalyway upgraded to 10.5.7...All Fully Functional