your method works fine for some games.
but youŽll get problems with newer games protected by
Safedisc 2.90. it have alcohol detection and wonŽt start.
so iŽve written this guide wich covers gamepacking.
here you can play without cd, cause the game is already cracked.
iŽve fixed the link on my homepage.
a working DTM Race Driver exe (fixed one, backup cd) is available
here