PAPI creation (ASM tweak)
From FSDeveloper Wiki
You can download this tutorial in PDF format here.
Before you can begin work using this tutorial, you must alter the MakeMDL.cfg file in your gmax/plugins subfolder. Add the following 2 lines.
[Options]
keep=1
Adding the "keep" option means that the ASM files you are required to modify as part of the tutorial are left behind after the model has been created using the standard Gmax export process.