Fake one Cookie, Accept And Send all others.

[TCM]

Ok. So we have a Host A and me B

B -> Fakes One Cookie to A (only one match)
A -> Responds by sending 3 Cookies back to B

I want to change one of those 3 Cookies to the initial fake cookie so I don't have to fake it anymore. I'm pretty sure I can use the Set-Cookie "Session only" to instead match one of the 3 cookies. Thus making the inital fake cookie now being faked by the web browser because it was "sorta legally" (in the browser's mind) set.

Get it?