Jordy15675, thanks for the quick reply and info. I'll try the Sapphire plug. It seems to do something else that I was looking to do.
I was wrong in one respect, Front Row is still part of "CoreServices".
DVDAssist works or should I say, it almost does everything: it mounts the iso, opens DVD Player, starts playing in DVD Player. It's just that the DVD Player app stays in the background behind Front Row, meaning, Front Row is the "front most app", commandeering the screen/Mac. I can quit Front Row and navigate to DVD Player to play the "iso", but it defeats the purpose of what I was trying to do.
My guess is that the part of the script that supposed to quit Front Row is broken. I looked at the script, but I'm not "fluent" in scripting and couldn't figure it out. It seems like it would be a simple fix, but not being a scripter I don't know, I'm just speculating.
Thanks again for your advice.