Er... couldn't you have put all of these links into a topic called "Gunn3r's links" or something, rather than posting about 10 individual topics? Or were you trying to raise your postcount to make up for the fact that your old account was banned?
That's probably why hardly anyone plays GTA3. I think it should say something like "Note: This client supports both GTA3 and Vice City", because people get confused when they visit mtavc.com.
And add some scroll bars or something for people playing the game on low resolutions. I play on 1024x768 and I still can't see some messages because they're too long.
Also, I reckon by default the MOTD should be switched off because the default "I haven't made a MOTD yet" screen gets annoying, and its kind of pointless.
You don't need to forward any ports. You may need to open ports if you have a firewall though (port 2003 by default for UDP traffic).
To connect, the clients type in the local IP address of the server.
Posty, I managed to get UT 2004 running smoothly on a 1GHz machine, so your 1.8 shouldn't have any problems.
Edit:
Quote from the link you posted:
Oh well. atleast i didnt waste *too* much time..
The idea however, is not dead. i shall have an active city in UT2K4..
You can download utilities to disable the Windows keys, Alt + Tab and Ctrl + Alt + Delete (whilst the program is running - it doesn't disable them permanently).