Its not 100% critical that you setup the programs0 dev partition. It will help you not eat up all your free space on the root partition, but thats about it. I don't use it. I store everything but the trivia program on root partition, and i keep the trivia program on my music partition. I've been meaning to setup the dev partition for quite some time, just haven't gotten around to it. I guess i'm just waiting for the car image builder.