Welcome. There are sticky thread indexes for modification write ups, product listing, maintenance, and repair at the top of the forum. One of them is how to get power out of the mirror I think. Many here switch to larger tires, but otherwise its a style thing, like tinting and de-badging... tinkering with the exhaust sound.
File uploads have been broken on and off over the past few days. I think once you get more posts or a member for a few weeks, the size limits are relaxed a bit.
Current: 2011 Grand Cherokee Overland V8, 2009 Liberty Rocky Mt V6
Previous: 2000 Grand Cherokee Laredo I6, 1979 CJ7 I6 Quadratrac