Dude are u serious? o'well anyways it's real simple:
1. Take out grip frame screws.
2. Punch out trigger pin. Make sure u don't lose the spring in the trigger.
3. Once trigger pin is out pull out the trigger.
4. Insert new in the same position as the old.
5. Put in trigger pin.
6. Adjust screws in the trigger to your liking.
7. Put back on the frame(being carful not to pinch eyewire)
8. Thighten screws on the trigger frame and ur done.
Hope this helps. if not hit me on aim BunkerX2