Dell Inspiron 1720 cpu upgrade

good day everyone!

I'm here to ask for help again with my cpu upgrading. In fact I've seen several mobile core2duo processors however I have no idea of this notebook's internal architecture. Not to mention I can't find anything on the internet also. For some magic in the past few weeks I've found that no matter how I want I can't upgrade the gef8600m GT video card in it, because only the 8400 and 8600 cards are supported. Now I'm at the cpu part. I want a cpu that supports sse4.1 also so at first I've found the T9300 core2duo cpu. It has 800MHz FSB speed, and the main thing is that I was wondering if this notebook supports 1066MHz FSB. Also I would like to ask if I can/have to change the cpu fan/coolers for a stronger cpu?

Thanks for every help!