Soundiver is a great program. I still like using the interface on each of my devices. But I have an E4x and the soundiver interface is really intense.

For mixer maps check out this link. There is only a Proteus and Proteus1 mixermap at the steinberg ftp site for download. Maybe you can modify it? For info about mixer maps check out this link.. http://perso.wanadoo.fr/jacques.kolly/ecubfile.htm