DOUBTS IN REGARDS WITH SERVICE INVOCATION URL, MEDIA FILES, RECORD DEFINITION, RUNTIME ENDPOINTS AND

Hello,
Please help me with the series of questions, as follows:
1)I would like to understand how to capture media files(WAV 88KBPS) while capturing details in iFrames which we share as response of SAVE CONFIGURATION URL?

2)Also in order to execute the services that we provide, we have to capture addressbook from the marketer which can be in a csv format per say, so how do we capture that?
3)Need some clarity on the invocation of Service invoke URL.

4)Is there a possibility of a marketer directly invoking the service and not passing via configuration cycle? Meaning, Will there be a case where the app is suppose to use the last configuration submitted by the marketer or we expect new configuration every single time the service is created on the canvas?