These WON2 patches act as the bare minimum necessary to play or host a server on WON2. The listing patch is already included in v18.104.22.168 or v22.214.171.124 Patches, more comprehensive packages, but may be installed seperately if you decide not to use any of Steamless Project Half-Life patches such as the 126.96.36.199 update.
Download the program and patch swds.dll. You may wish to make a backup of your original swds.dll in case the patch fails.
Next, add the following parameter to the command line of your shortcut to HLDS.exe: +sv_lan 1
If you have not already created a shortcut, re-read the Step-By-Step setup guide. You will need some way to launch the server with arguments and +sv_lan 1 is only one of several arguments you will need.
Below are two example command lines. These will launch a Counter-Strike server on de_dust with a maximum of 16 players.
C:\Sierra\Half-Life\hlds.exe -game cstrike +map de_dust +maxplayers 16 +sv_lan 1
C:\HLServer\hlds.exe -game cstrike +map de_dust +maxplayers 16 +sv_lan 1
You can now start your server by clicking the shortcut. Do not forget that the WON2 Listing Patch (see below) is also required for your server to be listed on WON2.
If you have questions not answered here, in the jumpstart or Support sections, you can ask them in the forums. If you feel these instructions need improving let us know!