Can anyone answer this question?
 

the chicken

If you have homesite or somethiing similar (something that wont add all kindsa crap code to your pages) you can login to the server through that, open the pages & do an extended search replace. search for where you want to enter the code. & put it in the replace & puts everything in there for you.
Should work no problem.
But if includes were used, yeah you woulda only had to edit one file :(

Good luck dude. :)