aMember Pro with Xiph.org's icecast streaming server

I am using aMember Pro for subscription use management. Upon successful authtentication, when I generate links for my icecast servers, I need to have an auth_header that comes back when the icecast server hits a certain URL to find out if they have access.

for example.

say check plugin is: http://www.eample.com/members/icecast_check.php

If the user has entered username and password properly, the auth_header would send back something like:

icecast-auth-user: 1

Otherwise, if it failed, it would send back something like:

icecast-auth-message: not a valid subscriber.

Does this seem like it's possible or maybe easy to figure out?

Thank you an advance for any help,
Shon