Advanced users who have purchased the xTuple Enhanced Commissions package and want to understand the details of how it works can always read the source code. Once purchased, the source code for the xTuple Enhanced Commissions package will be available to view from within the xTuple ERP application. After installation, just follow this path: xtcommission
and pick the script you want to learn more about. (Hint: scripts are named after the screen they affect.)
Most xTuple ERP extension packages are named after the product they implement. The xTuple Enhanced Commissions package is named xtcommission
.