Top Level Coroutine Overriding

Just asking if there is any Top Level Coroutine Override in CC 1.63. I attempted to do that but I just crashed the hole computer network I built by testing it. It was like a virus that made a computer completely unbootable

http://pastebin.com/zbMvKMCE

Bit ugly but thats what i made for my needs - will probably refine it for final product but here you go. it a bit redundant at times but it will tlco out of multi-shell. Uncomment one line in middle to reactivate rednet coroutine after tlco - i made it to remove it ;D