You have a Series1. It'* a 94. You need to really move the tensioners to full travel in order to get them on.
My suggestion is to put the accessory belt on the Alternator LAST. Do the Harmonic balancer, ps pump and idlers first, then work the tensioner to allow you to install it on the alternator last.
For the Supercharger belt, do the same, with the supercharger being the last pulley, with the tensioner fully depressed.
Where do you live? We may have someone nearby to help you for a minute. It should take only one or two minutes for each belt.