> Opening the bolts on the pump pulley, I use an old belt and let it
> get jammed between the main pulley and itself to get tighter as you turn 
the
> pulley. It works for opening and closing too.

I use two wrenches to loosen (a box and a socket). Once the first is loose, 
I take it almost all the way out and use it as a bracing point for the box 
wrench while loosening the second and third. 
Putting it back is even easier. Thread all three in by hand, then brace the 
pulley against the engine case using a box-open combination wrench by 
putting the box end BEHIND the pulley over the tip of one of the three 
bolts, and the lower "prong" of the open end into the engine lift point hole 
up top above the crank pulley.
Pics here:
<http://bange.us/wrenchtrick-loosen1.JPG>
<http://bange.us/wrenchtrick-loosen2.JPG>
<http://bange.us/wrenchtrick-front.JPG>
<http://bange.us/wrenchtrick-rear.jpg>