The configuration of the UPK mods is controlled solely via User Attributes in the i3d Mapper and “use” Modder the functions easy (as the functions of the Giants scripts also.) – It is not necessary / allowed the UPK “bridge” to.
Admittedly sets the UPK the properties of the modules not completely automatically (it does not know what you’re up to it) and you need to incorporate a bit if you want to use it in your mod. This can of course be connected in the beginning with frustration. Nevertheless, the only alternative would be to program your mod from scratch.
On the GitHub page is a documentary about how modules are, what they do and how to configure them. There are also a number of Beispielmods that show how the configuration is implemented. To create a simple tilting-bearings-filling-Mod is ne matter of a few minutes.
Mods that use the UPK are automatically multiplayer capability.
Mod by mor2000