the location, but you'll need to make a change in the registry...
The programme is expecting the disc to be in the drive that it was installed from.
Either find the location in the registry and change it, (not something I'd reccommend if you have any doubts at all about what you are doing!!!), or uninstall and reinstall, having first copied the contents of the installation disc to the HDD. Install from the HDD and the registry will expect the contents to be there.
I hope this helps?