I only had the bare essentials installed on my rig before I installed x64 ( no s/card , nic card , etc ; even extra motherboard items turned off in bios ) and everything went fine.
BUT .... I originally had my Netgear WG311T wireless nic installed first time around , but that caused a lock-up (bsod) during the install at the same point as yours . I knew there was no dedicated x64 driver for my nic card and tried it anyway while installing x64 and it just would not work that way .
So thats when I did ONLY the bare minimum hardware needed to install x64 , and then all went smooth . I installed the wireless nic AFTER the os install (with a generic driver) and as is fine .
Try the install with minimum hardware and see if your ok .