[SR-Users] Kamailio Asterisk Followup

Hello Sorry for another newbie question, but eventually with your "greatly appreciated" help I will get proficient in this application. After reading much RFC reading and docs for Kamailio I see where the benefits of using the sip proxy for registering devices while using asterisk for voicemail or ivr etc. has great benefit. I am not finding much on my end user interaction. If I use realtime integration and have multi domain use on kamailio, how do I allow the end user to configure their own IVR? Is it possible to use modules like the call flow control from freepbx and allow users to configure this themselves? Regards, Greg