guest access to printer

I have a non-domain ME laptop using wireless (WEP)to gain access to internet. I would like to provide access to a shared printer server. I can ping the printer IP, but can not add the printer. Error: Printer is offline. Test prints Ok from any domain machine. If I continue to add the printer off line, then use the printer I’m prompted for a password to connect (no place to add a username). Domain Admin cedentials are refused. I tried: adminuser password, \domain\adminuser\password, /u:domain\adminuser password. How can I give this person access?