I'm pretty sure the only stuff that can be stored on your SD card is stuff from your media folder, pics. videos, music. As far as making your SD card your default storage, the only way I've been able to figure out is to hook my BB up to Desktop Manager and uder the device tab, select device options>media>media on my device and set it up how you'd like. There might be an easier way to do this from just your BB and if there is I would like to find out. But this is the only way I know. Hope it helps.
