Kenny did a really nice write up on replacing his front brake rotors that also included repacking the front bearings. Check out this thread:

http://www.vehicross.info/forums/showthread.php?t=11324

There was also a write up on one of the other Isuzu sites that I downloaded, but can't find the link right now. It doesn't look too tough, and actually I'm about to tackle replacing the rotors and brake pads on all four corners and repacking the front bearings. I'm waiting for warmer weather so if it goes horribly wrong I can ride my bike to work while a shop fixes my screw ups. I would have a shop do it in the first place, but....well I'm cheap, and I'm kind of looking forward to getting grease under my fingernails.