YNH means Your Name Here.
eXX.dll = Eden Campaign Mission #XX
pXX.dll = Plymouth Campaign Mission #XX
tXX.dll = Tutorial #XX
c(YNH).dll = Colony Game
ademoX.dll = Auto-Demo #X (The demos that play during idle time on Outpost 2's main menu)
mlX(YNH).dll = Multiplayer, Last One Standing, X Players
mfX(YNH).dll = Multiplayer, Space Race, X Players
mmX(YNH).dll = Multiplayer, Midas, X Players
mrX(YNH).dll = Multiplayer, Resource Race, X Players
muX(YNH).dll = Multiplayer, Land Rush, X Players
Example Naming Conventions
CEP.dll = Eden Population colony game
CPS2.dll = Plymouth Starship 2 colony game
ml405.dll = 4P LoS
* mf4ccf.dll = 4P Space Race
mu6_12.dll = 6P Land Rush