If you would like your server to load a different DLL when it begins -- sevs.dll instead of hl.dll on a HLDM server, for instance -- create a
config.ini file in your
addons/metamod folder, and include a line like this:
Where the bit after "gamedll" is the path to the .dll file that you'd like Metamod to load, relative to your mod folder (the mod folder is "valve" for a HLDM server).