If you mean having PxPlus start up directly in the Nomads Panel editor then the answer is yes. Actually we do this all the time with the IDE and Windows does this when you right click on a ".pxpnl" file and select EDIT from the file explorer.
The easiest way to do this might be to call the NOM command directly.
Create a program that takes ARG(1) and passed it to *cmd/system/nom. Now you can launch pxplus with:
.../pxplus.exe yourprog -arg library
BTW: If you pass a panelname follewed by a semi-colon and then the library, the system will open that specific panel for editing.