I assume people have gotten a P4P800 motherboard to work with FC1. I am not one of those people...
I have a pretty basic machine: P4P800, 2.6, ATI9800. I get FC1 installed no problem but when it boots I get issues with the firewire controller (it just stops) and other things like not being able to launch firstboot (screen just freezes).
Before I start pasting error messages, does anyone have any initial suggestions about something I might be doing wrong?