I have a MacBook Pro from july of 2007, recently it has been slow and I don't have the money to buy a new one. What ram do you guys recommend to upgrade my 2GB 667 MHz DDR2 SDRAM to 4GB? also what internal hard drive can I upgrade to, since mine is only 120GB? I have the 120GB FUJITSU MHW2120BH, in it right now. Thanks!