Can't creat data.iso with mkisofs.exe. Trying to make selfbootable game

I'm trying to make my old games selfbootable so I can just toss the boot disk. i went throught the whole process of hacking the bins and burning the audio.raw but I can't seem to be able to create the data.iso. I really want to get this to work. Your help would be good.

[BrAvO_BoY]

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