Heh, famous last words... "surely it's not that hard??"
In theory, it's simple. As I said, I know nothing at all about DaemonScript, I've only ever used my batch file.
BUT... that being said.. I specifically use mamewah ONLY for my gazillion emulators, and not for my half-a-bazillion installed CD games, DVD images, etc... I just use shortcuts in the start menu for those.... the shortcuts run my batch file, which mounts the ISO, which does an autorun, and lets winders take over from there
AND... thinking it through, I have a feeling that what will happen to you when you try to use mamewah for this is... since you are running Daemon tools (or a batch file, or DaemonScript, or...), that's the process Mamewah is going to wait for before it tries to take control of your system again. In other words, mamewah will IMMEDIATELY come back to life, as it will see the process terminate. It will have no idea that PowerDVD took over on autorun.
THAT BEING SAID... you could probably get fancy with AHK or similar, wait for the PowerDVD window to close before exiting. But... if you are stumbling already, I fear that may not be a trivial solution.
So.... surely it CAN be that hard. I don't know that it necessarily is, but surely it CAN be.
First, see if you can get a batch file or daemonscript or something to mount the ISO and autorun PowerDVD. Leave mamewah out of the equation until you get at least that far. Then you can take it more of a step at a time I think, and you will get your solution.
And hey, everybody does something different with their cabs. Though, eventually, I think we all become purists. I used to think of mine as a jukebox, until I realized a dedicated mp3 machine made MUCH more sense than fighting for time with the kids.
good luck
Chemame