Ahh nevermind, I got it working now. for the R4 you have to update to the R4 Wood kernel (the manfacturer's kernel 1.18 doesnt work).
I can confirm I am able to extract the SAV file as a backup, and was also able to re-write it on to the retail cartridge of Pokemon White (US version), using your program and a R4 with the Wood Kernel. Thanks Pokedoc! Your program is awesome!