Before you proceed make a backup copy of your Steam.dll (Located in Half-Life's main folder)
This is just a Patch. There are numerous NoSteam Releases, so it may work, and it MAY NOT.
If you encounter any problems, or notice that game server connection has become considerably slower, you are encouraged to download the full "Adrenaline Gamer NoSteam" Release from bgt.ucoz.com or play.evrocom.net, as it has been thoroughly tested and it includes this patch.
Or, you can delete your steam.dll and restore the original one form the backup you (hopefully) made earlier.
With this patch you get a unique steamID in the Bulgarian AG Servers. Thus SteamID is generated automatically from your IP Adress. By Having a unique ID you are immune to many *bugs*, but you won't be able to play in the original steam servers.