Christian at Enfig (which is a small shop he owns and runs) did the install for $60. Took him 20 minutes, but he said the first time took him 1.5 hours. Now that he has the hang of it, it's really very easy. Personally, even though I'm fairly technical, I'd recommend having him do it. Enfig is just 2 miles from Lincoln Tunnel, so if you're not too far away, it may be the best bet.
FYI, the box installs behind the CD changer in the glove box. It has a few wires to connect, but the b*tch is getting it all to fit into that small space. $60 may be worth saving an hour or more of frustration.

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