I did mine DIY, but had a mate with a hoist to help me out. It gets a bit fiddly taking the factory exhaust off the rubber hangers, and putting the megan back onto the hangers.
.: 2010 E71 X6M - stock, daily driver, towcar :.
.: 2008 E92 M3 - 6MT, Carbon Roof, Eibach Springs, Megan Axle Back exhaust :.
.: 1997 E36 323i Frankenstein - too much to list, track whore, stripped, caged, MoTeC, S85B50 :.
.: 1994 E36 M3 3.0 - 19" BBS LM Reps, Bilsteins :.