Tao U3 x86_64 new install hangs?

Hi list!

I am trying to install Tao x86_64 U3 on a new box with an MSI K8N Neo2 
motherboard (which has nForce 3 chipset).

The x86 version of Tao boots all the way up to the graphical install 
screen (but not further because I want to install it on a 3Ware 9500 
controller for which the driver is missing in x86).

The x86_64 version however hangs during the initial boot up (even before 
the welcome screen appears). The system hangs immediately after the 
presence of the two PATA controllers is reported. The x86 version 
immediately reports the PATA devices it finds, the x86_64 version hangs 
before it can report any devices.

Ideas anyone?

Thanks and merry x-mas to all!
Remco