Processor compatibility question for a Dell Inspiron 8200

[Emission]

This is probably a long shot, but I figured I would ask anyway.

I have a Dell Inspiron 8200 laptop that uses an Intel 845MP chipset and makes use of Mobile Pentium 4 processors of socket 479 (technically 478, as 1 pin is missing from these CPUs). The chipset is a very similar match for the newer 855 used in a lot of the early Pentium M notebooks, and I was wondering, Pentium M processors possess the same or similar pin configuration that these Mobile Pentium 4s do, and the earlier Pentium M chips with 400 MHz bus would be, in theory, compatible with the earlier chipset as far as FSB speeds and memory types go. I have not yet looked to see if the pin configurations are the same, but I have a Pentium M 1.6 GHz Banias chip sitting around at home in a parts bin and was wondering if I could put it to some use in this notebook. If they we're pin compatible, is there a chance that it would work?

Thoughts?

Thanks guys.