You can do it man!!! You managed to join the Air Force...coilovers aren't a hard job at all and doing it yourself will grow your brain.
Here's a DIY. You can use a 1/4" adaptor to spread the knuckle grabbing the strut bottom in front...just slip it in and rotate 45*.
http://www.1addicts.com/forums/showthread.php?t=763316
Also, this is the 1M forum, and while the procedure to change suspension is the same you might get more views in the 135i forum.