Sherif Ali Salem

I have a modded xbox 360 with 120gb hdd and 2 more external hard disks for games when i play rgh games or games that i converted to ISO 2 GOD it works fine but when i try to put xbox original games it says that i need an update if it was on the HDD and if i burned it on a dvd it says fatal error and crash Please help as am trying to play Crash games like nitro cart and twinsanity but i can't