i want to upgrade my ipod touch 3d generation to OS 4.And i have some questions. currently i am jailbroken with spirit at 3.1.3 1)can i restore and upgrade directly to OS 4? 2)can i jailbreak OS 4 and if yes how? i havent connect to the forum for some time now,so i have stayed back xD.if these questions have been already answered,please forgive me!!