the Pentium 4s aren't soldered like wolffale.
yes you can remove it. Google away. there's no "way it works" under there though its just a silicon chip you cant see anything on. like on old chips before they started adding the IHS. you'll get more knowledge from Googling blowups of the architecture, but to each his own
Actually some are but it depends on what generation p4 it is. The later models are but the early models aren't.