making one composite jpeg from two

Can I use the software to make one composite Jpeg file from two? Specifically, I want to use this in the hairdressing industry. I would like to take a pic of a client and use a hair style that she saw in a magazine or some other format from which I can create a jpeg file. Now taking the hair style from the magazine I would like to morph it on to the pic of the client. In other words I would like to show the client what she would look like in her new doo. Can it be done. If so, how? I have tried with the trial versions and have gotten ridiculous results. I don't seem to be able to move the hair style on one to the body of the other without dragging other parts and the background along too. help please. Show me that I can accomplish this and I'll purchase the software today.