When we got wind of the new script call line we changed it to what we thought it was. Well, we were wrong. So I went back and changed all the lines to the correct form "sony.vegas" rather than "sony.mediasoftware.vegas"
Everything should be fine now. Basically, if you downloaded the new Vegas 5 updated scripts before the time of this post you should delete what you have, go back and download them again, then use the new ones only.
Sorry for the problems, as my father always said..."that's what you get when you send a boy (ie-not a java literate person) to do a man's (ie-java literate person) job!"
:)
Cheroxy