Wow! Thanks for the fast reply
Yeah I was trying to do like 30 comics at once. Like above, you said you can do do a directory with 200 comics, so I thought you had done what I was trying to do.
Single folders work fine, it's just a bit of pain going through the Action-Batch-Set Folder-Set Destination one by one.
I'm using CS4 and in playing around with the options as you can see I did get some different results.
Dumping them into the original directory and deleting the jpegs after isn't a ad idea actually.