This patch will allow PdaXrom 1.1.0 beta4 to use Prism2 based wifi CF cards. It includes the files needed to load the firmware into the card on insertion.
1) run the following in a terminal:
cd /
tar -zxf pdaxrom_beta4_prism2_firmware_loader_patch.tar.gz
2) Insert the CF wifi card. (firmware will be automatically loaded)
3) Configure the wlan0 interface as usual.
I hope this is helpful to others.
Note: This does not currently work with the newest kernel posted by Sashz for beta4.