Emberghost, Ornlu's right... Bryce isn't like Poser with it's rigid file structure complicating things. Just store your models wherever it's most convenient for you. In Bryce, use File > Import to bring them into Bryce. Arnold, Thanks.... at the risk of being rude, the easiest answer to your question would be to do a search in this forum for "HDRI" using the link at the bottom of the page. You'll find more than enough information to get you started.