Include additional python modules in RV package

Hi everyone!

I am currently developing a plugin for RV and since it is getting pretty big, I would like to split it up into separate python modules. After reading the manual I am still unsure how to declare them in the PACKAGE file so that RV puts them in the right place and does not recognize the “helper” modules as plugins.
So what is the best way of adding python modules (and/or packages) to your RV plugin?

Thanks in advance!