You don't need to delete Registry keys to re-install. Just pop the CD in the drive, get rid of the splash screen if it appears (click Exit or Quit or whatever), click My Computer, select your CD drive, look in a folder called setup for a program called Setup.exe and double-click to run it.It will install RTCW whether its already installed or not, and also if you've screwed up a previous un-installation.
- kendle
Also note these commands (thanks devZero):Return to Castle Wolfenstein relies on Internet communication via the IP protocol and UDP ports 27950, 27960, 27965 and 27952. These are the ports that the game uses for connection, message of the day, server browsing, and so forth. [Punkbuster also uses those ports.]
If you are using any type of firewall, either software or hardware based, you must ensure that traffic can pass on these ports. With a simple gateway using Network Address Translation (NAT), there is no limit on outgoing traffic and the game will probably work for client machines, but not servers, without any need to customize the gateway. For more sophisticated firewalls (such as Zone Alarm or Black Ice) you may need to configure the system to allow incoming and outgoing traffic on the ports listed above. The exact steps for doing this are specific to the firewall your are using. For more information you will need to consult with the firewall documentation or manufacturer.
We also do not advise setting up a Return to Castle Wolfenstein server for internet use on a machine that is not directly connected to the Internet. The problem is that any gateway router that translates an internal sub-net to a real IP - including NAT with ipForwarding or DMZ - requires that the internal server use an internal IP address, and these machines see clients on your LAN as different addresses from the internet and thus you cannot authorize these clients.
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