Best Authentication Plugin for Windows Media Services?

[unmgroup]

Hi all,

I was wondering if anybody knew of a good freeware or relatively lost cost plugin for doing username/password authentication in windows media services? I use CCBILL as my processor, so it would need to be compatible.

Thanks

P.S.: I've heard of Flicks Authentix, but it only works in Windows Server 2003 Enterprise Edition. I'm currently using Windows Server 2003 Standard.