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@jeff80
The cottorpins you mean?
I just used a smallish hammer and blck of wood under the edge of the crank so the vibrations didn't damage the bottom bracket and bearings. And hammered patiently and relativly gently. And to get old ones out, a centre punch as well.
Takes a while, but you don't want to damage anything. You may have to file the pins down on the angle to make thyem thin enough as well, they all seems pretty idiosyncratic as to exact size due to wear. If you do this, be carefull as if you file the cottor pin wrong or 'wonky' and not flat across, the crank arms will not line up properly and will be off in raleation to each other.
The correct way is to use a cottor-press (http://www.bikesmithdesign.com/CotterPress/)
but these are very hard to find in this country, and expensive so not really worth it unless ypu plan to build a lot of bikes. MAybe someone on here has an old one they no longer want?
T