Need script to assign printer in XP

Can someone give me a login script that works on XP/Pro clients that will assign a printer to a roaming profile based on the machine that's being logged in on? For example, user logs into machine1 and needs printer1, and then logs into machine2 and uses printer2, and the correct printer is connected respectively. There is one on the MS web site, but it doesn't seem to work on XP (at least I can't get it to). Also, when I run a login script, does the script need to reside on the server, or on the local machine (dumb question, I know, but I honestly don't know)? What folder do I put it in? One more stupid question, how do I find the UNC name of the printer to use in the script?
Thx,
Dei