No need to run a 64bit OS in Virtual Box just because the host system
is 64bit - and in fact WinXP 64bit was a total dog that has virtually
no hardware support !! Use the plain vanilla 32 bit WinXP and it will
work just fine :-)

Basically - 64bit hosts can run 32bit or 64bit guests, 32bit hosts can
only run 32bit guests.

R> It was suggested to use Virtual Box and run XP under Ubuntu but I
R> will need to see if there is a 64 bit version.