I recorded 150 songs into my computer, then I loaded them to my iPod, after that I removed these songs from my computer and loaded another 100 to be transfered to my iPod. When I plugged in my iPod it removed the 150 songs and loaded the other 100. That is not what I wanted!!! Could you, please tell me if there is a way to transfer songs to my iPod without deleting those I already have there? I do not want to save 500 songs in my computer!!! I want to keep them in my iPod, though.

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic