This works, but the game checks for the CDs anyway. But there's a Solution: Create an CD-image with f.i. Nero and Name the CD FF7DISC1 or FF7DISC2 or FF7DISC3, then create the image without a file on them. When you insert this "dummy-images" into a virtual image drive and change the data path in the registry to your virtual drive, the game will accept the images as CDs. If you have the "Run Movies from Harddrive-Hack" installed, you can play without CDs.