This memory patch will enable you to join LAN servers. The server does not need it, only the clients need it.
If you can't switch to nazi zombie mode, the host must type "ui_mapname map" in the console.
ex: "ui_mapname nazi_zombie_prototype" will change to the zombie map the game comes with
Source + Binary:
Download
Mirror
Signature for cod5-lanfix.zip:
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Check this comment for how to play over the latest Hamachi.
Thanks WickedPlayer.
Here is an alternate patched executable for version 1.0 only:
Download
Mirror
MD5: C5686DD25CC9158F2F081C5F6A851BA5
SHA-1: E38606320E80EB60528E9C8A3A4B7C5A26865164
SHA-512: 78B67BACDA6F1E6DF8E88DF543F739CE8C5C81A6846C26954037F6AC47CF9DBF07D66218C271C55A0558585F80B52276CB0552B56803D88B173EC233E3D51AB9
Whirlpool: 948B0C53699DA040B4B928474468DF4722E8512C2DD4A240E4909C6F5A62B75016780F8FD13F2E3DF5732B74917C95D547B011774CA1B758F87177013A7526BE