I have an iPhone which is synced with a PC. I have another PC and I am trying to transfer videos from it to the iPhone. iTunes is not letting me transfer. When I choose the option to sync manually, I get a prompt about everything on the iPhone will be erased. A NO NO! I tried a couple third party transfer tool TouchCopy and it seems I can't watch the transferred videos on the iPhone. I used another one from ImTOO and it keeps erroring out. Anyone knows how to transfer videos from a second PC without affecting what's already on the iPhone?