Okay, call me stupid, stretch belt? No standard belt, release the tensioner, install belt reapply tensioner. Maybe you need the special tool on the 3.0's but other than having to remove the serpentine belt to install the ac belt, it looks very straight forward if you ask me.
Oh I'm itching to be driving the E38, but just got her front end, rear bumper and roof repainted and doing some meticulous installations of the bumper trim, sunroof opening gasket. Then a retrofit of an electric cooling fan to take off the belt driven fan and US NBT system that includes HD and Sirius. But it's so blasted hot right now (103 to 107) and no breeze that I can't get myself to go out to the garage to work on her.
Plus I have an NBT EVO upgrade to perform onto the E70, but same problem with the heat and unfortunately between my E38 and an E36 ti in the garage that I am restoring for one of my boys, I don't have the room in there to work on the E70.
Doing this A/C work is bad enough. LOL