I went through this exercise and ended up buying a Home and Gardens package based on the Chief Architec engine. Think it was $99. Ended up using a 12" ruler, protractor, and graph paper instead. The software sucked. I must have f'd around with it for 10+ hours. Just couldn't get it to do what I wanted it to do. Save yourself the money. Unless you go top end CAD sw you are wasting your money in my opinion.