I've found it easier to use a torch and I've got a press sitting in the corner of the garage.
I don't like the out and out flame thrower idea either. Here's what I've found:
Have a large screwdriver available and ready to use on those collars that Clay talks about. Using a torch, evenly heat the collar until you see a wisp of smoke come off the rubber bushing. Once they start to smoke they're ready to go. Put the screwdriver in the bolt holes (for the front collars) or the adjustment hole (for the rears) and begin to twist the collar. They may cool enough as to where you will have to heat them again but, by working the screwdriver and collar back and forth they will slide right off. After that it's fairly easy to cut the bushing and remove it from the arm.
I put this off for a couple months and couldn't believe that I was done in five minutes
Not that tough and about a 1 or a 2 on a 10 scale.
Again... don't cook the sheite out of them, just get them warm enough to smoke a bit.
My $0.02