The diffs can be obtained directly from me or qoopz from IRC. Plus I just want to add a couple of things

1. the 64-bit is flaky for AMD users - just dont try it. It will not boot or may not boot at all. If you are using 64-bit AMD64 with SSE2 (no SSE3) , its even worst as 64-bit heavily depends upon SSSE3 and SSE3. Since SSE2 users would have to emulate SSE3 , plus no SSSE3 emulation for native SSE3 users , its pretty much gone. You can't get QuickTime X to use 64-bit because of SSSE3. It will just bounce or may just say loading movie which it will not do.

2. Kernel panic - try to disable ata kext and troubleshoot it yourself. there are ways on how do it. Boot with verbose

3. cpus=1 - Thats related to your dsdt. You may need it to be manually patched up or do try TSCSync from Voodo. This is related to your BIOS. I've taken a look at most of HPs DSDT.dsl and they didn't even include anything for cpu1. So good luck with that , some can be patched , the rest well - you're on your own