I just use a screwdriver, and push one piston in, change the pad, then push the other one in and repeat. put the pin and spring back in and go.
it makes it a little easier if you remove the MC cap first, also, if the brake fluid level is close to the full mark, I always drain a bid out first.
John

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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 560SL convertible
1987 190D 2.5-5SPEED!!!

1987 300TD
2005 Dodge Sprinter 2500 158"WB
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!