you can but here is what I'm going to tell you... I'm an IT tech & dell certified. so you can get just the shell and move over the other parts of your laptop, however... It takes on minimum an hour to get to the motherboard to just take it out. and make sure you map out where everything came from. then you have to clean off the insulators from the chip and redo everything and if you ahve the slightest electrostatic charge you could fry the motherboard. not to mention the other boards in there.
I wouldn't recommend it. but if you want to just fix your laptop it would be alot easier to just get a new keyboard and a new monitor then you don't have to open the bottom up at all. that is an easy fix.
*** in addition, that laptop appears to an older model from 2006 you may want to look at getting a newer one as eventually there won't be any updates for your machine and that can cause you alot of headaches.