Where can I find a .mnu syntax guide for DraftSight?

My company is starting to move from AutoCad to DraftSight. We want to move our custom menus into DraftSight as well. It has been published that DraftSight can read .mnu files, and it can, but apparently the syntax that it requires is slightly different from AutoCad. The submenu orgnaization is a complete mess when I load the menus that I have been using on AutoCad. I need a syntax guide so that I can sort things out. Where can I find this?