Volume expanded settings

Hi, i'm using a GB custom rom and i want the aokp feature which when you press volume key, it shows an option to expand the volume settings and change the volume for other things. For example when in homescreen i press volume to change ringtone, i want to be able to change media volume from homescreen, or an office app...

Please help me make a mod that do this!! (do'nt even know where to start)