Upgrade my CPU? VPC-EA series

Probably a very tedious question for you guys, but.......



So I'm one of those cheapskate VAIO owners who only jumped in when the E series came around. I got a very good deal on a small EA series with Blu-Ray burner. However the CPU is a bit of a donkey (dual core P6100, 2GHz).



I missed a mobile i5-540 on Ebay the other day, and was wondering if it would have worked (it's the same pin layout so I'm sure it will fit), and if it's a big challenge?



Thanks for any info