use vista 64bit home premium OEM (hp) license W/ 32bit home premium?

[jcmuse]

ive got a DV5-1000US that came with 64bit home premium on it. 64bit doesn't work with one or more of my programs. I would like to put 32bit instead on it. Can i use the 64bit license or do i have to purchase a new one?

[cditty]

OEM licenses don't transfer from 64 to 32 or vice versa. Can you run your programs in an xp virtual machine? I have the same laptop and that is what I do.