I've been working on a map for 4v4 slayer, its nothing special but it takes place outside of the boundary on sandbox. I've been successful in temporarily overloading the map, but i have yet to permanently overload the guardians. Tried using the weapon pile, trip mines, bubble shields, et al. I would love it if someone could overload it and save the variant for me. Bungie.net : Halo 3 File Details
I can't guarantee I will be able to do it for you but, the permanent way to block the towers is through items like block huges or walls. To get to the towers go into the skybubble and force a receiver node out side of the map. Go through the node and block all the towers via save & quit. Warning: The Tower closest to the sun has death barriers around it. You can still block the towers if you stay far away enough. Notice: The Towers won't shoot you when outside the map... usually
i will later. just send me a pm ok? and i will send it back to you. ill make the towers bloacked off you just need to go to the sky bubble and then use a teleporter to get out of the grid area then you spawn a wall or what ever and put it infront of the light part of the tower and it will be blocked off. plus rep mabey?
There is actually ready a prebuilt map for this kind of stuff. Linky: Bungie.net : Halo 3 File Details Doing it manually just takes longer.