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I downloaded the necessary tools for patching, but one of its instructions puzzles me:

>2. Create an image file (ISO) of your DVD using DVD Decrypter. http://www.dvddecrypter.org.uk/

I can't seem to find the FM3 disc (its an ISO from an emulator site) in its menu and seems to require a drive destination.

Do I need to mount FM5 on an actual drive or virtual drive first?

P.S. - I'm at Mission 25 now. The fight against the Kouten was terrifying. Each of my squad lost a limb due to its missiles.