Just how difficult is this job? Is there anything I should know before I start?

Somebody must have done this before, I would be grateful for any help before this weekend.

Remove the brake caliper, remove the locking wheel bearing nut using a 5MM allen then remove the hub and rotor. Put the rotor in a vise and remove the 5 10MM allen screws. Reverse the order to install. It's a good idea to clean and repack the wheel bearings at the same time. When tightening the wheel bearings use a feeler gage and allow .004 clearance between the nut and the bearing.