Do you have any 1/2" drive sockets? A trick I use is to slide sockets into the headtube. They have to be wide enough to help guide the long bolt and small enough to slide out the of the cups. Becareful not to get sockets stuck in between your cups. You can also do it one cup at a time. This trick works well for me...

Btw, the sette headset press from pricepoint is only 50 bucks.