Itunes Question.....?

[hotlife]

So my computer's hard drive needed to be replaced and I lost EVERYTHING ( great isnt it?) Anyway, i re-downloaded itunes onto the computer again, I synced my ipod and most of my music is back on my computer. However, none of my apps showed up. I didnt really think much of it, but later today, i proceeded to buy a song, and when i went to sync my ipod to get the song on it, Itunes was telling me that i need to erase my ipod since it is apart of another library.So if i erased it, I would assume all my apps would be lost,correct? Idk. I know this is a confusing question and I know cant really explain it well (sorry) but i plan on calling Itunes/ Apple/ whoever can help me tomorrow. Im just wondering if anyone else has experience this kind of problem and if you could give me some insight that would be great.

Once again, thanks, sorry for the confusing question.

[dell_xps]

Im sure you can re download any app or music you have paid for free now.
Search for an app you bought.
HTH