Firstly, I'd use DM tool to do any of the programming. The web interface is a spotty interface. Next before you do get into this have you worked on this stuff before? It's not that hard to do depending on how it's setup now. You just have to remake the Day Main menu and then make 2 more Menu's, one for each company and then build off the sub options. What is the vm db looking like now? Do the lines ring directly to the Auto Attendant or do they ring the phones first?