I'm planning putting two copies of music on my computer, one in a lossless format and another in a lossy format for my ipod. However, I dislike having two copies of every song present in my library since it makes things look more cluttered. I've experimented with creating another library in itunes and putting my lossless files in this, converting to lossy, and moving the lossy files to my other itunes library. This is kind of a pain though. I know lots of people here have two copies of their music, lossless and lossy, so I'm curious to see how you do it and rather you use multiple libraries or have everything in one.