my itouch is laggy...it freezes and goes to safe mode a lot of times. how do i restore it back to 3.1.3 (its original settings?)it's also spirit jailbroken. also...after i restore...how do i update to 4.0.1(jailbroken)? thanks guys edit: i have itunes 10 and when i click on restore it says it will restore it and update to the latest OS...but i don't want the latest OS since the latest OS is not jailbroken. thanks!