I'm designing a nuke portal (Custom from scratch) and am trying to make the home page of my website say in the corner, "Welcome back <Username>" by reading the cookies.

Now the problem is, I don't know how to find out where IPB sets the cookies it uses. I can program the script using PHP, all I need is the part of the script that looks for the cookies. (Which I have found, but would be nice to actually have.)
Can anyone help me find this variable not using any defined variables such as $name (or whatever) defined in the IPB directory? (I could also use this if I have to)

~ Thanks in Advance.