What is involved in replacing a front wheel bearing?

You're going to be looking at a hub and bearing assembly, which is the easy job. Remove the brake caliper and pull the rotor off. Disconnect the abs sensor, if applicable. Disconnect the outer tie rod and seperate. Remove the axle nut (may have to go to the parts store to get this size socket, usually 28mm-32mm). Seperate the axle from the knuckle by hitting with a soft hammer, don't ding the splines!! remove the upper ball joint and seperate. Remove the bolts in the back of the knuckle. To seperate the bearing from the knuckle may require a bit of elbow grease, a hammer, maybe a chisel, an air hammer if available.

Basics are, remove the caliper and rotor, remove axle center nut, unbolt bearing hub and remove (often a bit rusted in). Reverse process and drive.