Hello pansies,
And welcome to Apple Discussions!
Really, you should just
restore the iPod via iTunes. This will wipe all content from the iPod and set it back to its original default settings. That way your friend will have no problem setting it up with their computer.
Otherwise, see this article for more information and help regarding deleting songs from your iPod.
http://support.apple.com/kb/ht1855
On a side note, your friend will have to *Erase and Sync* the iPod upon syncing it with his or her iTunes library before they can use it, unless the *Manually manage music and movies* option is enabled from under the
Summary tab.
B-rock