This is not a difficult job to do at all. I took the saft apart on my car so many times I can right now probably do it with my eyes closed
What David says is right, but there are a few shortcuts. The shaft alignment marks shoudl already be on it, they will probably be hard to see, but they are placed on the shaft by the factory, so look for those. The support bearing can be easily replaced without any pullers at all, but you will need a hammer
I did my drive shaft with a standard hydraulic jack, no problemo, but the spaces are tight underneath there.
Things to watch for are torque specs on the flex discs, very important, also don't strip the bolts, they are somewhat soft actually if you ask me. They are also self locking, so if you are reusing them, get some locktite for them.
The shaft gets heavy especially when you bolt it down to the flex discs before you do the support bearing, and aligning the support bearing bolts can be troublesome.
Other then that, just take your time.
xp