Originally Posted by capwater
If this is a very rare once in a couple of years scenario, take it to your LBS. Most will do it for under 20 bucks right on the spot. It isn't worth the hassle to bodge some type of ghetto tool together and mess up your frame. Same goes for pressing in the cups.
I've been doing it ghetto (looooong skinny screwdriver + rubber mallet) for 16 years and never damaged any parts or frames. With all my bikes, wife and kids bikes, it's probably a 2x/year operation. That's ~$600 saved... I guess the ghetto paid for the used Burley tandem I just bought last month
YMMV
/I like the split copper pipe tool though -- I'll be going that route from now on.