Wow, that's a really nice user friendly description of the engine loading the game DLL!
What Pierre-Marie is saying is that the MOD game DLL will export some custom functions. There is a utility in the HPB bot source code (not the HPB bot template source code) called "exports.c" that will dump the functions exported from a game DLL (you can also use the Microsoft Visual Studio utility 'dumpbin /exports' to do this).
Dump the exported functions from the game DLL and compare that list to the stuff in the linkfunc.cpp file (you can ignore any exported functions that begin with an underscore '_'). Any new exported functions that come from the MOD game DLL that aren't already in linkfunc.cpp need to get added to linkfunc.cpp so that the engine can spawn entities that are custom to that MOD.
botman