I've never had to pull a boat motor yet, but I have pulled and re-installed the outdrive, and pulling it is pretty easy, you remove the 6 nuts on the upper unit, remove the trim rams (a nut on each end of the rod that goes thru the upper unit) and usually you can just slide it back. Be careful of your back, they are heavy, probably close to 100 lbs. I built a stand out of 2x6s for my Cobra and put adjustable casters under it so I can slide it under the drive and just slide it off without having to lift anything. I have watched my neighbor pull an engine out of his old Chapparall using a tree branch and a come along or block and tackle, I forget which. The drive has to come off first, because the drive shaft has to come out of the engine coupler, for the engine to lift up. I'd want to have someone with me that has done it before. Partly it depends on how high up you have to lift the engine to get it to clear the boat's gunnels and transom. I bet if you could rent a big enough engine hoist it would not be that bad of a job. As far as getting info on how to do this, go over to
http://www.iboats.com go to the I/O repairs forum, there are some very knowldgeable people there, and in general, iboats is one of the best boater do it yourself forums, in terms of the combined knowledge. Guys there have literally completely rebuilt boats, changed drives, motors, re-done transoms, you name it, they have done it.
The main thing for now, is to try to get the water out of the block (getting cold here on LI, down to freezing in some places) and get -100 AF in there.