Paths can be added via the Scripts::Add function in the sdk, during Load:
aSdk->scripts->Add(aHandle, L"module.reds");
Paths can either directories or files (handled by scc), relative to the plugin's folder, or absolute (mainly for testing/development).
This will also force script compilation when REDmods are enabled, which will cause double-compilation if cybercmd is installed - cybercmd is no longer needed for this scenario.
Paired with https://github.com/WopsS/RED4ext/pull/21