The moto drivers are the only ones i know of. I know this isn't much help but if you get a chance to use a newer computer, that could help. I have had issues flashing on a 32 bit computer in the past but never on a 64 bit.
I finally got it to work!! I tried flashing my RZR to 211 w/ RSD 5.7 on a newer laptop, worked the first try. Apparently, the problem the whole time was my older CPU/32-bit processor.
Thanks for everyone's help....and patience!!