This is toolbar nr 10 in my pak/config/menuconf.tab
# editor tools
toolbar[10][0]=general_tool[10],25,,+100
toolbar[10][1]=general_tool[10],26,,-100
toolbar[10][2]=general_tool[9]
toolbar[10][3]=general_tool[14],27,,city_road
toolbar[10][4]=simple_tool[3]
toolbar[10][5]=dialog_tool[20]
toolbar[10][6]=general_tool[26]
toolbar[10][7]=dialog_tool[21]
toolbar[10][8]=dialog_tool[22]
toolbar[10][9]=dialog_tool[23]
toolbar[10][10]=general_tool[30]
toolbar[10][11]=simple_tool[6]
toolbar[10][12]=dialog_tool[24]
toolbar[10][13]=general_tool[28]
toolbar[10][14]=ways(3,255)
How to activate: change to public player, then click special tools, then map editor, then the rivers are in the map editor toolbar.