Jim, advice? Usually, worth what you pay for it, no? Seriously, I am not familiar with any speakers that have glued in drivers. A few have a rubber gasket between the back of the driver and the front of the cabinet that can make it seem like the driver is glued on, though it is not and usually just needs to be pried off with a screwdriver, after the mounting bolts are removed. Driver failure is the most common cause of infant death in speakers, so manufacturers design them to have the drivers removable. In fact, the tabs that attach the crossover to the driver are usually just press on, not even soldered, which makes it easier still to remove them. My one caution is that you may need to put pressure on your screwdriver to remove the mounting screws. Don't slip or your screwdriver will go right through the cone and you will be....well, screwed. I have been there, In fact, use your free hand to keep the screwdriver away from the cone.
Finally, just to verify the no glue thing, you may want to talk to your buddies at PSB one more time.
Marty