[Fiahhh]

(Is assuming this is the tut David was talking about)

I have checked and Yelo is installed correctly. If I use a normal, unmodded mainmenu.map, the game loads and is fine. But if I modify it in Menu Menu Menu/Map Map Map (and resign it), it just gets to 100% then does nothing.

However, I am able to replace a level with lockout (I would rename the .map file 'lockout'), load an unmodified mainmenu, choose lockout, and the map I replaced it with would work. However, this means I can only use one modified level per time.