Ok, i know that to have a good backup, you need to have quallity discs,good burn,defrag your comp blah blah... but i found another way to make the gameplay faster! Ok, basically all you gotta do is to just refresh the TOC. I used my copy of Sonic Heroes to refresh the TOC, then i used my backup of Kingdom Hearts 2 Final Mix + and it worked fast! better than before. So basically,refresh your TOC!