My opinion is that between these 2 cpu's, even if its the easiest swap in the world--which I bet it isn't--you aren't going to see any better performance by going to the T7200.
The T4200 has a higher FSB, and both chips are 2.0Ghz,..both support 64-bit.
The temps are slightly different but the bottom line---don't waste your time, effort, and money!
so there is no way to install T7200 in to my laptop?
I agree!
save for a desktop if you really want performance.
Replying to your own post is a bit selfish isn't it?