currently this laptop has the pentium p2600 at its default and I want to be cleared if a i5-450m will run in this laptop, will it be a noticeable improvement with its speed? Aslo considering that it can be upgraded up to 8gb ram, what is the highest frequency it can take or should i buy? I heard that 1600 is enough. Next is the storage I want to know if i can put a 120gb ssd in the main socket and hdd 500gb in a caddy bay. Please help if all of these is worth the upgrade rather than buying a new laptop for an online school.