The shutter was trigger by remote inside the vehicle while I was driving. The trick is to go REALLY slowly. I would take about 5-10 shots at a time, and then chimp and re-compose.
When you are done, you get a bunch of shots that look like this (OOC jpg, dust spots and all...)
That's the easy part.
Once you get back home, the real work begins. I think I had about 60 mins post processing the first pic I posted, and about 90-120 mins post processing the one that's up for voting. Needless to say, you're going to be doing ALOT
of work with the clone tool. The trick to making this look decent is to zoom in and using a good sized "soft" brush, work in a very detailed way to brush away the boom. It really helps to copy the back ground layer and work on that one. That way, you can bring back any loss of detail if it gets fuzzy from your cloning technique. It's a very tedious and slow process so don't rush it. This is where taking off you front plate, and making sure the suction cups are parallel to the conduit saves a lot of cloning work.
When I shot these, on the first one, I processed the background and the foreground separately because I wanted different effects for each. I then blended them together using a clipping mask.
That's the nuts and bolts of it. Now, some words of caution.
1). There is significant risk of damaging your car or your camera taking shots like this. There are any number of things that can go wrong from a suction cup failure, to the cups scratching your paint to God knows what. If you do this and fubar your stuff, don't blame, me, I told you so!
2). Make sure you are in a vacant parking lot. I figured the boom stuck about 6-7 feet off the end of my car. I rubbed it on the ground more than once and bumped it into the curb a time or two. When you move the rig can really flex, so just because it's off the ground now doesn't mean it will stay off the ground.
3). Try to find the most solid points in teh body work to attach the cups. You're putting alot of weight on them, and they can bend/flex (maybe permanently) if you're not careful.
That's all I can think of right now. I'm sure I'll think of more stuff later. Anyway, that's my guide to the poor man's boom rig. They can get way more fancy, I had a guy wire system devised to help stop boom flex that I never really used. I usually didn't have alot of time away from the house so the faster the setup, the better.
Any questions, just fire away.