I am the one who wrote the FSUIPC tutorial, and am honored to see Pete Dowson referring to it.
I know the info in the tutorial can be found in this forum, but have found that my tutorial, with it's, screenshot illustrated, step by step script has helped many flight simmers that have had Pete Dowson's amazing utility, but never really managed to experience it's true value. And it only shows the tip of the iceberg ;)
Here is the link to the tutorial, and here to the topic on the Flight Simulator Network website. I hope it's found useful.
Btw.: In no way am I implicating to be in any way involved with Pete Dowson's FSUIPC. I only write tutorials to try and help those with limited or no experience/technical background to enjoy all that a flight simulator and it's utilities/add-on's have to offer, and found that many appreciate my scripting.