first of all, as im trying to figure out itunes id like to ask some ques. about my itouch.. 1- i added some videos from my itunes library, but there was no sound when i tryed watching it on itouch..why is this? 2- PDF viewer..after i jailbroke my 1.1.1 itouch, first thing i installed was pdf viewer. but i dont know where to add my pdf files to view them on my itouch? some advise? 3- NES..do i have to install games first on my computer then to my itouch?? or can i directly install them from a site on safari on itouch?? anybody give me some advise?