Download to SD Card via USB OTG?

I’m a BB newbie. I would like to download files from my PC to the BeagleBoard SD card via the USBOTG port (I want to download the files in “real time”, not with a USB Thumb Drive) after Angstrom is already up and running. Is this possible? I have a rev C BB and am running the “X-stable-20090612” version of Angstrom.

The BB enumerates as a “CDC Composite Gadget” but I haven’t been able to find any drivers that work with this.

Thanks in advance!