I am running Windows XP Pro, SP 3, and woiuld like to sync my Iphone 4 with my outlook version. 2007, contacts. I woiuild like the option of ether overwriting from the phone tot he computer, or from the computer to the phone, or just exchange, and update from both (if that's possible).
You can do this through iTunes. If you connect your phone and click on it where it appears under Devices, then on the screen that appears, click on the Info tab. In here you have the option to Sync Contacts with a drop-down box to choose what program you want to sync with.
The first time you do it, it should give you the option of which source you want to overwrite or to merge. After that, by default it will overwrite the Outlook contacts with the iPhone contacts unless you scroll to the bottom of the Info page to the Advanced section and check Contacts to overwrite the phone.