Trying to finish my cross breed of Provisioning and UC app for my ROMS. If this works, your CAB's will need to be in \Storage Card\Cabs for UC. It will have 3 windows within the main window, one for provisioning, one for MMS settings, and one for your UC Cabs. And you will be able to select what you want. In the testing phase now, I hope it works. Should know soon.
UPDATE: Getting very very close on the UC Provisioning App. Here is a Beta pic, i decided to just dump the cabs into one window instead of 3, less confusion. But it still will show all the provisioning cabs, MMS settings cabs, and \storage card\cabs directory. Here's a beta pic.