iPhone being synced with new computer

[JoEw]

Ok about 1 week ago i purchased my new quad core imac i transferred all my files including my itunes library (music, podcasts, videos and apps all of it). Now i need to make my new imac my default itunes library for my iphone, but to do this itunes is saying i must delete ally stuff off my iphone and put it back on again. I am fine doing this but i have a few concerns.
-What exactly will itunes delete off my iPhone? My pictures, contacts anything like that?
-Will all my app preferences and game scores be deleted when itunes resyncs them?

 

[steve-p]

If you transferred the whole iTunes folder correctly then it should realise it's a device you synced with before and not be telling you it needs to start from scratch. You can move iTunes between machines this way and I moved mine from Windows to Mac and it just synced as before. Are you sure you copied everything in the iTunes folder?