Hessian Border Station is a two map campaign by Johannes Lerch. This is the original campaign with a fixed download link, included AIN files, fixed marines on minimap displaying. Fully compatible with the original VPK, what means that you can connect to each other or to dedicated servers with no problems.
Download
http://gamebanana.com/maps/190829
Installation Instructions
Also run snd_updateaudiocache command in game console after installation and restart game if you want to hear custom sounds the map uses.