Information to help you load and run AutoCAD 2000 on your Windows 7 (64bit) system.
I had to upgrade from Windows 7 Home edition to Windows & professional ($90.00)
Then I downloded Windows virtual PC and Windows XP Mode (free download). The Windows XP Mode runs in the background (in its own window). I loaded AutoCAD 2000 Architectural Desktop from my software CD. As I was doing this I had to go to the program compatibility (start-programs-accessories-program compatibility - pick 'from C D drive') I changed the compatibility to windows 98/ me.
I was glad to have found this so I don't have to spend $1000 to $5000 to upgrade AitoCAD.
Also I have a driver that lets me run my HP 750c+ plotter on Windows 7 - 64bit if you need that.
Good Luck.
Jeff