Dear sir,
I've been working in Visual Basic 6 for 3 years, and I can provide you a professional solution for your requirement. I can make you a wizard application easy to use. All you'll need to do is to load an exe file, and select what option you want for limiting its use, and customize the message witch will appear when your clients will run the application. If you want I can provide you more details about this, and maybe a sample.