If anyone is interested in learning how to improve their CAD drawings using Photoshop there is a very intuitive and easy to understand book available on the market. The book is called, "Enhancing CAD Drawings with Photoshop" by Scott Onstott.
The book first takes you through the basic concepts and tools of Photoshop. After, you learn to apply these new skills to your CAD drawings using easy to follow tutorials.
If you are interested in the book and want more information you can visit the following site: http://www.sybex.com/sybexbooks.nsf/booklist/4386
