Thanks for the info. I am pretty familiar with the systems myself, I was just thinking of using it for instruction. Thought it may increase the effectiveness of learning as opposed to drawing it out on a napkin. The programs I have seen at a couple of airlines I have worked for and Flight Safety really made me understand the systems a lot better, and I could actually see what happend in abnormal situations. What I am really asking is the opinions of ppl who have actually used the software and if it would allow me to use the software as many airlines and corporate training outfits do to help in the understanding of normal and abnormal situations of the various systems.