Including mods code into mission code

[octopos 1]

I got a problem already posted on this forum at: http://forums.bistudio.com/showthread.php?144643-Bad-Vehicle-Type

But now I generalized my problem for a question: How did I integrate mods code with my mission?

I mean, there's a way to use new class or extended class created by mods directly in my mission, without the needing of client downloading mods directly? I'm not interested in complex mods that use own textures, dlls, just in new class used by some mods.

Big problem right now is about new classes and extended ones in config.cpp of a mod, that I can't use in my mission. All my attempts always return Bad vehicle type .

Any help will be really appreciated.

Thanks ;)