Karen Bonaker has begun a series of posts containing videos which will show you all about creating paper textures in Corel Painter. Karen is a long-time user of Painter, a teacher on the subject and a talented water-colorist. Do yourself a favor and subscribe to the blog so you don't miss any of these posts. You'll be glad you did. :)

http://karenbonakerart.wordpress.com/2011/12/01/painter-12-paper-textures-101-make-paper-dialog/