Uhhh... Sony Vaio always soldered their CPU to their motherboard. So does other vendors. However, some engineering laptops (workstation) like mine (signature) are not tied to the motherboard. Therefore, It's pretty much universal...
Also my laptop is a Sony VAIO VPCEB4L1E:
Windows 7 Home Premuim 64bit
Intel Core i3 380m @2.53Ghz
When you said being so crap, is it slow? Maybe you just need to reformat the HDD and fresh reinstall Win 7 or add more RAM. The ultimate upgrade that you can make to your laptop is an SSD 256 GB SATA III(6Gb/s), You will see the big difference in performance and it is gonna be so responsive.
I doubt you will see much improvement. What, exactly, makes you feel your processor is crap? I have several older computers running 'dated' core 2 duos, all the way down to the celeron DC 1.6 Ghz. They are all fast for tasks suited for them. So to hear that a modern CPU that is faster than half my computers is crap, it makes me suspicious that the blame is placed in the wrong spot.