Manu admin mod on CoD2 cracked server

Hi.
I have CoD2 public server, which is cracked and I tried to install ManuAdminMod in it.
After I realised that's impossible, I've switched server into original, and then mod was working.
But problem was that on Balkan is piracy allowed, so there are not a lot of people, who have original key, (and people who have it, aren't playing on public servers, than only matches) so server was 0-24 empty.
Is it possible to edit this mod, so server scans players' IP address (subnet mask), not GUID? (because there are not GUIDs in CoD2 cracked servers)
Could you make it?
I am mostly interested in controling server without rcon, with IP address. (like with GUID in current mod)
I would be very grateful.