What ya need to do is put the crossover cable aside now that you have the new router. Take computer A, B, and C and use standard ethernet cables on them, all plugging into the router.
Now depending on what kind of router you went out and bought, it will be able to plug the internet directly into the router or you will have to work around it.
Has an internet port in router, goodie the easiest way simply take an ethernet uplink cable and plug it into your cable modem and router.
From your definition sounds like one computer has more than one nic card(2 lan cards). So plug the internet into the compA port A and the compA portB into the router. Then share the internet connection and you're good to go, the downside of this setup is that compA has to always be on for the others to access the internet.
Hope that helps ya out, make sure to read up on your routers manual and you should be able to figure it out
**Oops sry forgot about the printer, for it simply plug it into whichever computer will be on most of the time, such as compA. Then as long as compA is plugged into the router and the printer is shared then you will be able use the printer across the network.
Edited by Bobbydoo8, 21 January 2007 - 06:00 AM.