Acer :: Making Aspire 6920g Faster

i have an acer aspire 6920g with following hardware:

-intel core 2 duo t8100 (2.1 GHz, 800MHz FSB, 3mb L2 cache)
-nvidioa geforce 9500m gs
- 4 GB DDR2 Ram

anyway when watching videos on youtube with people playing games on the same laptop i found out that my laptop is slower than the ones other poeple have? i already tried to clean it with those air bottles but my laptop is still slower than the ones on youtube is there anyway to make my laptop faste without overclocking it because i dont wanna loose my warranty. another question i have is because of changing hardware i read some hreads about changing cpus most people recommended a core 2 duo t9300 but would it be a bis increase in my cause? when looking on alternate i saw that they have a t9600 for the same price so i wondered whether i could use that one as welll even though it has a fsb of 1066 instead of my 800 that im using right now another one i saw was the p8600 (its said penryn-3m i dont know what that means) but it also has a fsb of 1066

another thing is changing the graphic card first i have a question where i can buy graphic cards for laptops and then i read in a thread that the highest i can get is a 9650m gs because i only have a mxm II slot in my pc but on notebookcheck.com it says that the 9650 needs a mxm III slot. and the i have a question whether i could could use one of the new graphic cards from the geforce gtx 2000 serie

and finaly i have the question what else i could change to make my pc faster like
ram or hard drive or soo