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

[SiKAsSDrUmMeR]

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. It always scrolls down and goes through all the mkisofs nfo and goes to the regular command screen. I really want to get this to work. Any help would be good.