It's pretty easy to do. The vacuum pump you don't have to do anything with, its belt will come off when you loosen the alternator bolts. The power steering pump and alternator each have one bolt that serves as a hinge and a second that lets you adjust the tension. I forget if the AC has 2 or 3 bolts you have to loosen to adjust it, but it's the same idea. Outermost belt comes off first, so the order of removal is AC -> power steering pump -> vacuum pump -> alternator. And if it's not obvious, just loosen the bolts, don't pull them out.
Installation is the reverse of removal. A 2-3 foot pry bar on the alternator will help you tension the belt, and I use the pry bar for the AC compressor too. For the power steering pump, there's a square hole that you can stick a 1/2' breaker bar perfectly in to to make tightening that belt super easy. The alternator belt is the biggest PITA of the bunch, if you find an easy way to do that one let me know
Definitely pay attention to your alternator belt. It wobbles like crazy no matter what you do and it breaks far more often than the other belts. When it snaps, your vacuum pump belt stops being spun and you lose your power brakes. Keep spare belts and underpants handy.