I am looking to upgrade my Early 2008 macbook (MB402LL/A) I have upgraded the Ram to 4gb but am looking to replace the Hard Drive with a faster SSD. My question is How much faster would it be? Is it worth replacing at this point? My second (or third) question is will this work: http://www.crucial.com/store/mpartspecs.aspx?mtbpoid=5F2CD70FA5CA7304 And will I need anything more than this? Thank you.