Pre-Nuvo - Kustom Zone amp KHS6640 - Control4

[650bmw]

I have a Kustom 6 Zone amp with keypad and IR control. It does not have rs232. Is there anyway to get the basic functions of audio source swithing and volume control. That is really all i need out of it. Any help would be appreciated. The Idea of spending $2000.00 for an 8 zone system isn't going over very well with the household financial manager(Wife).

Here is a link to some tech data on the Zone amp.

http://www.nuvotechnologies.com/prozone/owners_manuals/KHS6640Manual.pdf

Thanks in advance for any help you can give