How can I sync my iPhone/iPad to a new computer without losing data on the devices?

Question

I have the itunes home sharing set up. I have 2 different laptops, each with it's own iTunes on it, and each has it's own library. I have my iPad and iPhone synced to Laptop #1, but this laptop is old and I want to sync my devices to Laptop #2. I've used the home sharing to transfer the songs, videos, etc to move everything from the iTunes on Laptop #1 to the iTunes on Laptop #2. But when I connected my devices to Laptop #2, I got the message saying that my devices were synced to a different iTunes and they can only be synced with 1 iTunes at a time. It warned me if I synced to Laptop #2, I would lose the data on my device, and the data on the iTunes of Laptop #2 would be transferred.
I don't want to lose any of the data on my devices, but I want to sync to Laptop #2. How can I do this? Any help is appreciated, thanks!

Answer 1

Hello again and sorry to bother you. I was hoping you could help me with iTunes 10.5. This update has been a pain. When I first installed it, my entire library was gone. Luckily, I saved the "iTunes Library" file before updating and copied it in place and my library appeared. But now the problem I'm having is that the iTunes can't find any of the "original" files, even though my iTunes Media file location has not changed (it's on an external network drive". When I click on the "Do you want to find the original file" I can find it in the appropriate folder. I checked the "Preferences" and under "Advanced" I re-mapped it to the appropriate location and already had the 2 boxes for iTunes organizing files checked. Then went to "File" and "Organize Library" and clicked the first check box and then got the "Copying Files" bar. When this was completed, I thought it would be able to find the original files. But I'm still getting the same error message about not being able to find the "original" files. Do you have any suggestions? Thanks again for your help.