I have several systems including 2 osx I use often . My 3g iphone is sync with the first bone ( 10.5.8 ) and I would like my new iphone 4g or with the two bones ( 10.6.4 and my " old system to 10.5.8 ) . Is there a simple way to my two itunes libraries will please even the synchronize iphone ( without losing apps purchased in the store ). How to sync iphone 4g with 2 itunes libraries . Please help.