I have an ipod with music already on it. How do i share my sisters itunes library without deleting my music?

The computer with my itunes library on it crashed about a year ago, and i lost my hard drive, with my itunes on it. My sister and i have similar musical taste, so i don't mind if all of her music syncs onto my ipod. It will let me do this, but not without deleting all of the music already on my ipod. Is there anyway to gain all of her music, without deleting mine?

You may try this ipod transfer, it's a nice iTunes alternative that can help you manage iPod files including delete, upload, play, copy, etc. It's much easier to use than iTunes. It can also help you manage multiple iPods on one computer or manage iPod on multiple computers, even copy music and video from iPod back to computer or iTunes. So you will not lose your iPod files even though you switch to a new computer. My friends recommend it to me, it works pretty well.

Here is a solution. All you need is to get all existing music/videos from your iPod to your sisters computer for backup and iTunes.
In this case, all songs/videos (both yours and hers) are on the iTunes library that you can syn with whenever you wish to without deleting any files.
Simply use this popular program called Tansee iPod Transfer