Not able to sync to SD card
 

I just a got a new 32gb microSDHC card for my Motorola Atrix, which has 16gb of internal memory. How can I sync my Winamp music library across both of these? Say, fill up the sd card and put any overflow on the internal hard drive. My computer recognizes the internal memory as drive E and the external card as the F drive.

If this isn't possible, how can I just have it sync to the external card? No matter what I try (modifying "File Name Format" on the "Advanced" tab, connecting to "F:" under the pmp_android.dll settings), it still only syncs to the internal memory.

Thanks!