You can use the command that opens the menu in order to make a submenu, then enter the trail commands in said submenu. Here's an example:
PHP Code:
[New Menu = Main Menu]
[Menu Settings]
MENU_OPEN = say /mainmenu
[Menu Items]
"Open Submenu" "say /submenu"
[New Menu = Submenu]
[Menu Settings]
MENU_OPEN = say /submenu
[Menu Items]
"Red Trail" "say trail red"