Mike,
That is very ambitious of you, but in this case I somehow suspect that the
OP will not want to go through the hassle of editing the code each time they
update their site.
I don't have the time to mess with it myself, and would suggest the OP check
out the possibility of their host providing an alternative, more
customizable form program before you invest much time in this. I would be
very surprised if the host doesn't provide something. Mine provides support
for Ultra Mail, as an example. Then, they could insert via the code fragment
tool. It would take a bit more work on the OP's part to get it set up, but
in the long run would be easier to maintain.
DavidF