>>5 If you need a program to run a server if you are going to make it into a game, I suggest either Windows Server 2003 or 2008.
Windows Server 2003 Enterprise (x86)
http://thepiratebay.se/torrent/4685277
Windows Server 2008 Enterprise (x64)
http://thepiratebay.se/torrent/6315935
A third option is to run a server off of Linux.
http://xubuntu.org/
A fourth option is to run it off another OS like Windows XP or Windows 2000.
PS
Sorry for the triple post, I keep forgetting stuff.