Here is an updated PowerMill Post processor. It was modified using Delcam's PM Post Processor 4.7.00. I performed simple tests using PowerMill 2010 and Mach3.
This version is for Mach3 controller and fixes some of the IJK coordinates system (now uses absolute rather than incremental values). There are some other changes to make things work as expected.
Again as always, use this at your own risk. I cannot be responsible for anything.