double ip address on the same ethernet card: is it possible?

Dear all, I need some help to configure my net configuration using ethernet card with SUSE 9.0 Pro on a laptop. I have set up correctly the card with ip, dns and all the stuff, and connection works : but now I would like to ADD a new configuration on the same card but with different parameters after some works have been done in my workplace and I cannot use the same ip address (and all other parameters) on different floors and sections of the building. What do I have to do? Can I follow the YAST configuration wizard or do I have to make some set up in order to have a double ip and make the machine automatically choose the ip? Thanx to all LM