I don't agree. If a 3.5 you simply loosten the idler for the serpentine and off it comes. Loosten the idler for the A/C, from the bottom, and reinstall the belt. Tighten the idler. Replace the serpentine and tighten it's idler. If it takes more than 1/2 hour then there's something wrong.
If you simply want to remove the belt and never use it again, just cut it.