Yes I knew there was alot of other stuff (barrel, etc.) that was not legal for IDPA regrading the gun in the picture. The only reason for posting the picture was to show an example of the butler style stirrup cut.
FYI, I finally heard back from Robert Ray at IDPA HQ, and this was his ruling incase anyone is interested.
"While you are correct that it is not completely a full length dust cover, I am afraid that we will view it as such. We will very likely be adopting the same requirement of USPSA Singlestack which is 3.25 inches from the back of the slide stop pin."
Thanks to everyone for all the information/suggestions.