well its probable that the game only searches for the 1st optical drive but doesnt go any further than the 1st one it finds.

if your dvd is master on your ide cable or the 1st optical sata drive it finds and your cdrw is 2nd/slave drive, then its logical it would not see the disc in the cdrw, if it doesnt go any further than 1st opticald rive that is. thats just bad programming ;-)

anyway, glad you got it working, you can also try to make an image and place the virtual drive's letter before your real optical drives, it might work also if you hide d-tools with YASU.