istan, Your the man, thanks for your help!!! I actually found those same pictures you found and thats how I came up with my guess on the belt configuration. To try and confirm my guess I emailed someone on one of the threads you recommended in hopes to get ahold of an install manual.
For a little explaination of why I need this information, im a mechanical engineer working on a thesis that involves the design and ultimately the fabrication of a variable speed supercharger. I need to fabricate a belt and pulley system that is able to handle the increased loads that the variable speed supercharger will require, compared to a normal fixed ratio supercharger. The variable speed drive I am designing is similar in concept to the older variable speed supercharger McCulloch made (the variable ratio planetary ball drive) which you can check out at vs57.com
if your interested.
At this point im thinking that I might go with a belt and pulley configuration below, that is if its feasible. Wont know until I actually get my hands dirty. Ill have to replace the stock "ribbed" idler pulley with "smooth" idler pulley. I think this design provides a greater belt to pulley contact area compared to the ATI design and possibly handle greater loads.