Angtrom Image for Beagleboard xM with MMC2 and MMC3

Hello,

I am new to this group (and Beagleboards), so forgive me if this question had been answered before. I have a custom expansion board for xM that wires out MMC2 and 3 to SD connectors. I am not SW savvy but was wondering if there is an image for Beagleboard xM that enables these for MMC or SD/SDIO usage.
I was also wondering in general where would be a good Angstrom starting point for building custom images. every time I power cycle the xM it looses memory of everything we installed (ramdisk?).

Thank you very much.
Ashraf

MMC2 is enabled when you're using a zippy1 or zippy2 expansionboard