I guess you mean that you want to use one monitor, mouse and keyboard with 2 PC base units?
If bothe base units can be placed close togetehr I would not go to the trouble of networking, but would suggest a KVM switch, a little gadget designed for just this use!
have a look here
www.dabs.co.uk and search for 2-port KVM with cables to get an idea what i am on about!
I hope this helps