How do i adjust my laptop graphics card to a higher setting for gaming.I have a toshiba satellite L505- ES5018 laptop.It is a 15.6 inch skreen.It has an intel graphics media accelerator 4500M with 128MB-1341MB.The specs says (dynamically allocated shared graphics memory).What does this mean?.I am using the bethseda gaming softwares of Oblivion and Morrowind.