multiple IPs on same NIC

[GATal@aol.com]

Greetings group,
     On a recent Mandrake 7.2 install, I've been trying to configure two IP addresses on my 3com PCI card. One of the IPs will be assigned to me via dhcp by my provider, but the second IP I want to use would be for my home LAN (private IP space). I can get one of them to work at a time, but not both (by shutting one and bring the other up). Am I missing something here? Is this possible to do with one NIC? TIA...

Guy