67tony wrote:
I recently created a new Playlist, and would like to sync my iPod to reflect this change, but I don't want to alter my existing iPod music selections.
Then incorporate the existing selection into the new Playlist.
However, if this means that your Playlist is now larger than the capacity of your iPod, then you can't make such a change without affecting the existing music content on your iPod.
If this does not help, then please explain in more detail, what you are trying to do. There is a method of automatically swapping music on the iPod for other music in your Library. For example, iTunes could remove songs that you have played recently and replace them with songs you have not played in a while. If that sounds like something you would like to try, let us know and we can help devise some Smart Playlists that will achieve this.