Currently, it doesn't seem possible to create an MSI that is larger than 850MB or so. Is there some way I can create a multi-cab install that I can put on a single DVD? It seems right now all I can do is create multiple CDs. Thanks for your help.
It is possible to do this. After you have built the project, you have to edit the MSI file with Orca.
Go to Media table and modify all the entries in the VolumeLabel column to the same value, say Disk1. After that label your DVD with the same name, Disk1.