I purchased my Adobe Photoshop (6) a long time ago. Is there anything that I can do to my computer or the disc to install and run it on a Windows 7 operating system?

I have installed it from the disc many times on every new machine that I have gotten and Adobe helps me with updating. But now I can't install it on the 7 operating system and the oldest installer that I can download from Adobe is for Shop 7. Does anyone have any suggestions or a way to contact Adobe?