Huh? How much electronics you really know?
What you asking is.. practically impossible.. Why? Cause you wanna de-solder the CPU from the MacBook Pro (de-soldering SMT ain't impossible) and replace it with a "Nehalem"; that has completely different pin layouts, not to mention it's a server processor, not lower powered mobile type.. AND it's physically physically BIGGER!!
Plus, even if you forced the "Nehalem" to fit, you'll soon realised it's been a complete waste of effort. As the Penryn's chipset is completely incompatible!!!