1999 Chevy S-10 Front rotors

It's about as easy as it gets.
About as hard as replacing the brake pads.

But I think you are wrong about the rotors being part of the hub, I think they are separate.

On the 2 wheel drive the front rotors are the old style.
Not hard to replace if you pay attention. Remove the caliper from it's bracket, then the bracket unbolts from the steering knuckle. Now you remove the dust cover from the end of the hub, Remove the cotter pin and remove the nut. Now pull the outer bearing and the hub and inner bearing all at once. When you install the new rotor you will want to make sure you use new inner seals and new bearings. Some come with the outer races already installed, others don't, depends on where you buy them. Either way you need two inner and two outer bearings, plus the seals and GOOD bearing grease. Pack the new bearings and install the hub. Tighten down the nut while rotating the hub. Tighten it to about 12-15 ft lb. Then back it off and re-tighten snug. Now back off the nut until you can install the cotter pin through one of the holes in the spindle and nut. Put some grease in the end cap and tap it into place.
Reinstall the brakes and see what you have.

I'm sorry, I was wrong about it being so easy.
Your rotors ARE part of your hub since you have 2 wheel drive.

If you had 4 wheel drive, the rotors would be a bit easier to change.

Please follow SWilliams instructions.