If what you want to do is to make a network between 2 computers what you have to do is to connect a crossover cable (cat5utp) to both pc's. (RJ45 connector to network card, both computers must have a network card)
Then from your windows xp click on start/control panel/network connections/create new connection. Follow the steps of the connection wizard and allow creation of a setup floppy disk.
Insert the floppy disk into the other computer and run the file there. The connection wizard will open, just follow the steps again.
This is the simplest way to create a network between 2 computers.
If what you want is a remote connection let me know since this is slightly different.
I read a forum a while back about networking two different computers together while still using one mouse, one keyboard and one monitor. It said to buy some sort of switch if I remember correctly and everything should work. I couldn't find the forum so any directions would be a big help. I also wanted to know if it would be a problem if one computer was using Windows 98 as it's operating system and the other computer was running Windows XP Home? Any and all tips about how to do this as quick and cheap as possible would be appreciated. Too, I would like to know about how to best link my printer between the two PC's as well. Thanks!!!