Re: Moving MP3s to iTunes.
Depends what browser you're using, but this is pretty general.
Right click on the button that says MP3. Go to the choice that says something like "Save target as..." Pick a place to put it, probably My Music, but it doesn't matter as long as you know where it is. Once it's downloaded, go to iTunes, and under File, go to Add file to library. Then, select the song from where you saved it!
After you've done that, you can change the meta-data to make it have the right tags.