Still wondering if someone can help me with this. I've poseted numerous messages all over but nobody has responded. After installation, when I go to run Bryce 4 I get a message: "Please insert the Bryce CD Rom into the CD Rom drive for verification." I do that and then I get a message: "There was an error checking your CD drive. Please put the Bryce CD into the CD Rom drive." And that's that. It won't let me get any further than that, I can't run the program. Now what really bugs me is that I remember seeing a simialr message on the Bryce Forum some time ago, with the exact same language, etc., but I can't remember when or where and I've tried finding the note but it's impossible. Could someone be kind enough to help? Mike.