i just bought the same thing and i called my friend up who plays d-1 he did that for me but its very difficult you have to play with the switches, trigger and butttons sorry i cant help you tho GL with the gun
If you want to set off and go develop some grand new thing, you don't need millions of dollars of capitalization. You need enough pizza and Diet Coke to stick in your refrigerator, a cheap PC to work on, and the dedication to go through with it. We slept on floors. We waded across rivers. -John Carmack
turn off gun, set dip switch 2 to on, turn on gun (led will cycle through the options fast) then pull trigger to the setting you want to change,hold trigger for a second (led will flash current setting) then pull the trigger number of times you want to change the setting to (semi is 1, psp is 2, millenium is 3) then set dip switch 2 to off and your done. btw it's all in the stickies!!!!