I installed 10.6.5 with few issues and 0 panics, but I did a very limited version of the tutorial in this thread.
I am currently attempting to install 10.6.6 in the same method. I'll let you know how it goes.
I try to stay away from kexts I don't REALLLLLY need, because the few times I tried to follow this tutorial to the T, I got infinite panics. My method is pretty hahutzy's 1 through 6, then I do the kexts I need. Have not yet gotten sleep.