Cant add music after synchronizing

Question

Hi.
After iTunes updated itself a few days ago, I have not been able to add anything to the iPod. I did not really understand why until I attached it to my stationary computer(thought it was iTunes - Windows Vista problems, and the other computer runs XP) and got a "you iPod is synchronized with another iTunes library"-message. This is utterly ********. iTunes tried to synchronize with the iPod, but I turned it down. And now I can't add songs. iTunes at the stationary asks if I want to delete everything and synchronize it with the stationery's iTunes. But I don't want it synchronized with any iTunes. I just want to add my music to the player whenever i want.
Thats my status and problem. Here's the question:
Is it possible for me to fix this, without having to delete everything on the iPod. I don't want to add 30gb of music and find album pictures again. Thats just boring.
Help appreciated!

Answer 1

*I attached it to my stationary computer(thought it was iTunes - Windows Vista problems, and the other computer runs XP) and got a "you iPod is synchronized with another iTunes library"-message*
You can't "sync" that is automatically update an iPod from multiple libraries or computers. If you want to connect and use an iPod on more than one computer you need to change the update preference in the iPod Summary tab to "Manually manage music and videos" and click Apply. In this mode you can directly access the content of the iPod and play it through iTunes and you can drag and drop whatever you want to the iPod from either library:
Using iPod with Multiple computers
Managing content manually on iPod
iPod 101: Fill 'er Up
Something else to be aware of when using an iPod in manual mode is that the "Do Not Disconnect" message will remain on the display until you physically eject the device. In that case use Safely Remove Hardware icon in the Windows system tray on your desktop or check this link: Safely Disconnect IPod