I use that procedure but I take out the four bolts, then tilt the track sideways and slide it off the roller. Reverse this step when putting it back in. The two recalcitrant bolts can then be removed with just a Phillips and I hit them with a little penetrent and can even use a small plastic hammer to 'impact" them out so the Phillips heads don't strip.
I've replaced 4 sets so far (not on the same car) and I've often considered putting a sanding bit on the Dremel and making a half-moon at the bottom of the window under each 'hidden' screw, but I'm only ever going to replace each one once so............
------------------
Notchbacks RULE
"Let a man drive a Fiero and he'll own one.
Teach a man to fix a Fiero and he'll own eight."
[This message has been edited by Fierobruiser (edited 05-31-2005).]