To list other SHOUTcast Widgets streams/users in your player, in your SHOUTcast Widgets v5 admin click on General Settings. On the first page look for Community Status and choose Public. 

In order to be taking advantage of the network system, you must be using on of the network players. To change players, also on the General Settings page click on the Player tab. Under Player Type, choose any player that has Network in it