[Asterisk-Users] How to mark a user for a conference

[Jagan Mohan]

Hi All,

   I would like to mark a user so that all users other than marked
user hear music-on-hold till the marked user joins the conference.
   I took a look at 
http://www.voip-info.org/wiki-Asterisk+cmd+MeetMe, but could not get
sufficient info.
    I'm using meetme for conferencing.
   Could anyone point me to a url which has the configuration details
using meetme.

Thanks,
Jagan