Alan, my gut feeling tells me that such code snippet turns into a weapon on your screen... with which you may easily kill your site.
Prove that's not the case, or have a pro dealing with it, as I'm just a user myself, not having the time and nerves to help you tediously fixing something which isn't broken yet - or force someone else to do so. You do appreciate that, don't you?
Here's a sneaky one, hehe:
Post the code block which the new code is to go into, and mark the exact position where it's must go. Costs you <2mins, and would prove a good point for you... oh, and it'd be so much more useful than that arrow which is pointing... well, "somewhere"...