I know a lot of you have played Worms (Sc version) and you know how the missles go from homing to dumbfire, I was wondering how you do that because all my units just follow the target.

You probably have preserve trigger for when the units are moving to the unit with a centered location. If you don't have preserve trigger to move to that location, just tell each missile to move to the location once, it should keep going there without changing course.
That is if I'm understanding you correctly....
Oh stupid me! I did have it on preserve! Must be all that repeated trigger droning
Thanks

You'll need it on preserve. Unless you plan on only having the missile fire once.
What you realy want to do, is have the move command be part of the same trigger as the create missile trigger, that way it only fires once. Or, have the move command require the missile to be close to the unit that launches the missile.
If you want them to go around and stuff use the Roam Around:Junk Yar Dog AI scrip. But i'm not shure if they will continuesly move, I never used this trigger. I never needed to. Try it and you will see if it works. It should thought!