Just a data point, I've been using the 64 bit LiveDVD with out problems.
livedvd64_SL53_2009-03-23.iso
This is on a desktop system with an Intel mother board. I don't have any
details handy at the moment.
--
Brent L. Bates (UNIX Sys. Admin.)
M.S. 912 Phone:(757) 865-1400, x204
NASA Langley Research Center FAX:(757) 865-8177
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Email: [log in to unmask]http://www.vigyan.com/~blbates/