Regarding upload folder
In the Getting Started Guide, Step 1 (Upload the files) reads: "With PowerMessenger, the first step is to upload all these files to your live server. It is recommended that you copy all the PowerMessenger files to the root of your current website".
Why would these files be placed in the root? Surely, you realize that almost every site to which this would be added already has a file named index.php in the root and overwriting would be undesirable.
If I put it in a folder named "pmessenger" or something similar though, then that folder will contain WA_DataAssist and WA_SecurityAssist folders, which will also reside elsewhere if other WA solutions are deployed to the same site.