Wow so many answers and not one person told him exactly how to set it up yet. Ok well I'll tell you. It's just simple networking.
Go to the first PC and set the IP address to 192.168.0.2 and subnet mask to 255.255.255.0. Then go to the 2nd PC and set the IP address to 192.168.0.3 and subnet mask to 255.255.255.0. Then go to the third PC and set the IP address to 192.168.0.4. Make sure when setting the IP addresses your setting it on the NIC. Once setup you should be able to see each PC and have no problems playing games.
When you first set it up you said you used 192.168.x.253. Well they weren't all in the same subnet and you had no gateways or routers setup to cross over into their subnet. Hence filesharing stopped working.
Don't worry about IPX, Netbuei, or anything else. You only need TCP/IP for the games your using.
edit: Fixed typo in IP address
Go to the first PC and set the IP address to 192.168.0.2 and subnet mask to 255.255.255.0. Then go to the 2nd PC and set the IP address to 192.168.0.3 and subnet mask to 255.255.255.0. Then go to the third PC and set the IP address to 192.168.0.4. Make sure when setting the IP addresses your setting it on the NIC. Once setup you should be able to see each PC and have no problems playing games.
When you first set it up you said you used 192.168.x.253. Well they weren't all in the same subnet and you had no gateways or routers setup to cross over into their subnet. Hence filesharing stopped working.
Don't worry about IPX, Netbuei, or anything else. You only need TCP/IP for the games your using.
edit: Fixed typo in IP address