I'm wondering if your laptop can use the vanilla kernel- I haven't seen a lot of people using that system yet, as it's pretty new. It could be that you have 6gb of RAM- try using the maxmem=4096 boot flag at the Chameleon prompt.
Could be that your system can't run the Qoopz kernel that's on the default CD. Did you try the beta CD 2 or 3? The 10.6.2 kernel is on that. Also, the Beta CDs don't have a DSDT on them- that could be messing things up. If that's not working, you may have to try the USB method- it's more universal- could be that your CD/DVD drive isn't picking up the Boot CD correctly, as it does with IDE drives on desktops.
It's the mobile PM55 chipset, it's not quite the same as the desktop P55 chipset so that could very well cause some issues as Apple doesn't use it in any of its computers as yet.
Laptops generally have a very limited range of BIOS options you can change and there might well be something enabled or disabled that OSX doesn't like.
Core i7-3770K, Gigabyte Gigabyte GA-Z77X-UD5H-WB WiFi (not using the Wi-Fi card), Galaxy GeForce GTX 660 Ti, 8GB of Kingston HyperX Memory at 2133MHz, 60GB Corsair Force GT SSD for OS X, a bunch of other drives, a Pioneer DVD writer and a few bits that don't work in OS X...