First of all, you MUST have the version 1.1 patch in order for this to work. Then create a new file called "TheGalaxyIsYours" and capitalization does count! Enter any mission (even a skirmish) and press Ctrl+0 and at the bottom of the screen it should say "stormtrooper". Press up or down until you find the unit you want (I've gotten Darth Vader, snowtroopers, and 4 different Lukes!). Then press left to get what you chose. If you think your guys are weak, just press Num lock+Keypad asterik (*) to get 999,999 (!) life for your selected unit.