ipod

I have a U2 ipod. I decided to add more songs using my brother's computer. Stupid me, I lost all my original songs and came up with only 50 songs. That was two weeks ago. Now I have 1,500 plus songs in my library but I have to use my brother's computer or else I will lose everything again. Imagine I have to bring all my CDs to my brother in Laguna just to stack on my library. Now that I am back in Baguio, how can I unload my music in my computer without losing everything? Help!