if you are transfering your old tank into the new, you wont really have a full cycle as you are using your existing water, sand, rock, etc. as long as you are keeping all those aspects of you biological filter, and not raising the bio-load, it will be able to continue to handle it just as it has before (worked with me).
Or you can just leave them in the old tank while you prepare the new tank and just transfer over when its ready. if it is going in the same location, you can do what i did. transfer everything into a garbage can (with water of course) and move the tank to a temporary location. then put everything back into the temporary tank till the new one is ready.