I actually fixed a lot of my lockups coupled with odd haptic feedback by moving them back to phone. Not sure which one it was that was causing it, however. Also, if they have widgets that you use you will no longer be able to use them if you move it to SD
App2SD is a good app that will help in moving apps to SD. It has a notification upon an apps installation to let you know if you can move it, and it can scan your phone for all apps eligible for movement.