Jamie,
I gave up trying to remove my rear shock bushings. The hacksaw blade trick is a great idea, I didn't think of that at the time.
As for getting them in. I've had good results with using a car jack (just the small hand operated one from the trunk of my car) and pushing up against a fixed object (in my case, a steel support girder from the shed). I pushed in my copper swingarm bushings like this. It's a nice, slow, even pressure.
Rick.