[Roberto80]

So the selection not showing up? If you use ZCMD in admin scrip,and OnPlayerCommandText in mSelection,then try to change it..
And remember,if you use ShowModelSelectionMenuEx,the callback is OnPlayerModelSelectionEx(playerid, response, extraid, modelid).. And if you use ShowModelSelectionMenu,then the callback is OnPlayerModelSelection(playerid, response, listid, modelid)