[dwittmier]

Just to add to jmart's instructions above, for things like .net, controls, and screen mods it's best to install to the device (step 4). For most general apps however, install to the card. Otherwise your limited device memory will get filled up pretty fast. For the same reason I always initially copy the cab to the card (step 1) regardless of what it is. If you do transfer it to the phone storage you may want to delete the cab after installing it to free up space.