Rich its not that hard, you have to remove the main water pump belt by loosening the tension pulley (theres a bolt on the bottom of the pulley where it attaches to the engine) and take that belt off. then you can slip the AC belt on and get that tight, then reassemble the main water pump belt.
The hardest part is getting to the bolt that holds the water pump pulley tight, you can see it best from under the 90.
Don't forget to Search first then ask questions later! The loose nut behind the wheel