Here is the belt info for an (my) 2003 Supercharged PreRunner.
A/C Belt - Duralast(from Autozone) - 342K4 4PK0870
P/S Belt - Duralast(from Autozone) - 420K4 4PK1065
S/C Belt - Toyota(from Toyota Dealer) -PTR30-35040
I recently noticed that my supercharger belt was cracking. So, of course I searched TW for any hints, tips, or info on belt numbers and how to's. I found nothing. I ended up just going to Autozone and getting the Power steering belt and the A/C belt and replacing them as well because they had to come off to replace the Supercharger belt. I looked around and found that the Power Steering pump had a tension bolt, so I loosened the mount bolt that locks the tensioner in place, then the tensioner. The A/C had a pulley, which is located below the Power Steering, that also had a tension bolt. I had to loosen the pulley's center spindle bolt to release the tensioner to be able to relieve the tension. Both belts were still a little tough to get off and required a little finess, the help of a flat head screwdriver took care of that.
Once the A/C and Power Steering belts were off, I used a 3/8" drive breaker bar to release the S/C belt. Then, with a little bit of force, slid the S/C belt behind the tensioner pulley, and manuevered it around the fan and it was out.
Reverse the process to install!