installing a serpentine belt

Has anyone had to install a serpentine belt on a 91 blazer? Is there a trick to it? Having a hard time. Any help or instructions would be a HUGE help.

Here is a diagram you will need when putting the new belt on.
Removing the belt is a knuckle buster unless you have the right tools.
You will have to use a 1/2 inch breaker bar to move the tensioner (2 in the picture) and slide the belt of the tensioner is spring loaded and under high stress, be careful. Then go back on with the belt the same way just make sure to get the serp groves lined up with the pulley groves.