Migrating iPhone to new host computer, shared with iPod
Both computers currently run Win XP Pro, and both are running the current version of iTunes (8.0.2). iPhone has been backed up, and all applications have been updated to current. iPhone currently has no music/videos on it (nor is there such in the laptop's iTunes library. There is much music on the desktop iTunes library, and I don't want to lose that library. Both versions of iTunes have been set up for manual syncing and manual organization of the library music. Lastly, iPhone syncs to my Exchange server at work using ActiveSync over the air - that is where the contacts, calendar, email, etc. come from.
How do I this without losing everything on the iPhone? I can't be the first person to have this problem, but very little is published on solving it. Didn't find an apps note from Apple, and found little of use in other online forums.
I want to keep my iPod (and my music library) on the desktop machine. I want to add my iPhone to that desktop machine, and make it its new sync home. I don't want to lose any of my applications or other data on the iPhone. I want to manually configure which device will get music - playlists are fine for this purpose, though I really haven't used them before.
Absolutely imperative that iPhone retains its ability to sync to my Exchange Server, as this is a primary business tool (and works very well!). I can't break that in the process.
What's the secret sauce for making this transition without breaking something? Thanks for any advice you may offer.
Core i7, Windows XP Pro, iPhone 3G, iPod Nano