Murder Gamemode Help!

Okay, I made my Garrys Mod server have murder as the gamemode. Once I played a few test rounds, I noticed that you cant change the map unless your an admin. How can I fix that?

Who do you want to change the map?

Anybody, like the RTV system.

The implement an RTV system. Admin’s can only change the map because there’s not a voting system.

http://forum.facepunch.com/showthread.php?t=1268353