With photoshop how do you replace a face with another face?

What are the tools you use?

Hi,
there several tutorials with different techniques

here a couple that should answer questions
http://www.metacafe.com/watch/1355149/p ... utemaster/

http://dewaldhein.com/joomla/photoshop/75-face-off.html

http://www.youtube.com/watch?v=hb6lFBPV_4k what good about this one is that they talked about color match...

the erazer tool is a verry powerfull tool when it comes to face replacement.

now, after tracing the "new face" around with the pen tool hold the controll key and press entre (Ctr+Enter) then copy and paste then set it as u will,

you will now pick your erazer tool and reduce the steght and flow from 100% to like 25 to 30 % then scrub it on the surface edges of the new treamed face to faid and blend it with the other body; afther wich you will go to eiter color balance, level, or curves to balance the color and the tone.

that' all i can say to help for now.