Hi all. I did a bunch of research online over the past two months about various problems associated with using the TASCAM 1641, mostly with Windows and 64-bit OS. I finally bit the bullet and gave it a rip myself. I had absolutely no problems.
For those interested, I posted my setup and some tips on my blog here:
http://www.behrmannprojekt.com/blog/...-on-windows-7/