Synching iphone, switching From Mac to PC?

My other half surrently uses my Mac to sync her iphone but would like to use her own PC (trouble ahead?), but obviously Apple haven't considered people changing their computers… I know you can use some 3rd party software to back your iphone up and so not lose your content when you swap between one mac and another or one Windows machine and another but can you take the data using a Mac and reapply it using a Windows machine? If so how and which software?

You can download iTunes onto a PC for free

She will need to transfer her iTunes library from her Mac to the PC. You can have more than one iTunes library on the same computer. Assuming she will have her own computer login account on the PC, her iTunes library transferred from her Mac can be placed under her computer login account on the PC. This will probably be the best way to do this if you have different iTunes accounts.

Follow the instructions included with this link for transferring her iTunes library from her Mac to the PC. The same would apply in the reverse.

http://support.apple.com/.../kb/HT1751

If you share the same iTunes account and she only wants to transfer the iTunes content that was purchased/downloaded from the iTunes store from her iPhone to your iTunes library on the PC, with her iPhone connected to iTunes on the PC and without syncing, at the iTunes menu bar go to File and select Transfer Purchases From - the name of her iPhone. This will include all music purchased from the iTunes store that is on her iPhone, and all 3rd party apps - all paid and free apps.

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