I am currently on deployment and received an iPhone 4 to use as soon as I hit the first US territory that I come to. I went to plug it into my iTunes on my MacBook and was hit with the prompt that it's required to use MAC OS X 10.5 and above. I'm still running MAC OS X 10.4.11. I have a new MacBook Pro awaiting my arrival at home and am wondering if I am able to plug it into my buddies MacBook here just to do the required registration. Will this pose a problem when I get home and sync it with my own MacBook? Any advice would be appreciated.