Ah, yes, it is not 100% transparent.
Start the compiler-
type N for New project
Name it
then save it - that will be the rhc file
Then fill in the author and plug-in settings if you like, (1) but the key is the command settings (2) - that lets you go find the py file(s) to include, i.e the commands. Then Build (3) to create the rhp file
-Pascal