Question : Running 16 bit applications on Windows 7 or Vista

I have a suftware that i run on my customers that is completely windows compatible except for and executable that runs in a DOS mode.  I had no problen running it on Windows Xp but now on 7 64 bits i cant. I tried changing the compatibility on the executable but ir doesent work.  Any idea? I found a Microsoft Program that might work but it only runs on Windows 7 pro and I have basic.  any help?

Answer : Running 16 bit applications on Windows 7 or Vista

If you're running Windows 7 Professional, Enterprise or Ultimate edition I would advise you to try Windows XP Mode.
It is easy and fast on the setup and you application will work for sure.
What's the best of it, you can make a shortcut on your Windows 7 desktop which will point to your 16-bit application in XP mode.
http://www.microsoft.com/windows/virtual-pc/download.aspx