It is very easy to get half-life working on Neuwon.
1. Make sure you have or will install Half-life Patch 126.96.36.199 (link)
2. Install the NEW 188.8.131.52 Game Patch, This contains the newest engine & mod files to play on NeuWon. This also creates a Unique CDKey which is required to authenticate.
3. Launch Half-life and play!
All original network features such at: Chat & id's are fully functional!