What we do is both install it and then run it using Compatibility mode, set for Win2k - hasn't failed yet.
Right-click the ACAD setup file, select the Compatibility tab, and make the appropriate choice. Run setup. It should work as smoothly as if on a Win2k machine. Once installed, set compatibility mode for the ACAD exe file as well, and you should be in business.
I've done this on a half dozen machines, no prob.
- gh