registering 3rd Party module libraries in Linux

[cmunoz]

Specifically I'm trying to use bennuplaynet.so and a few other "unofficial" mods in linux.
I placed them along with the other modules in the bennugd/lib folder, but I'm still getting an error when I try to compile which says:
error: Library "bennuplaynet.so" not found ( token error: "bennuplaynet" ).
or if I use include:
: error: bennuplaynet: file not found ( token error: "INCLUDE" ).
I'm guessing the library needs to be registered with bgdc somehow?