Map Internet Email and Aliases to GroupW

Ok .. so anyone have a location to learn about just how to MAP incoming Internet email and internet email aliases to a groupwise mail box? .. GW 5.5 .. using the Internet Agent .. I can send and receive full internet email now via the GW clients through the Internet GW Agent gateway .. works great .. however I need to have different names on the email address .. ie cynthia needs to be cmartin@domain .. as you know changing the logons in novell would be a real drag .. so I know there is a way tomap and or change incoming email to a current GW mailbox name .. I also have a need to handle multi email aliases pointing to the same GW mailbox .. HELP!