Sorry for not replying sooner but not been on the forum for a while..
Great, I read your entire post parkym. That is exactly what I would like to do. How do you actually setup theater view to list your games? It almost appears that they can only be added to the home page....OR
MC mainly has 3 categories and I decided to use the Video category as the place to have the games in. I then wanted to add a new media sub type called 'Video Game' but I was not able to do this, so after looking at the forum for any ideas I decided to go down the route of creating user field which I called 'Video Sub Type' and in this included the all the types from Media Sub Type plus the extra one for Video game. I only use this user field for videos.
To make this work, like it does with Media Sub Type, I had to make changes to all my video media files to use the new field (fortunately MC does this quickly for you using the move/copy fields option in library tools). Also had to change the scheme to use this field instead of the media field.
The bat file will only run if the media type is Data but Data is not part of the video scheme so all I had to do to get the files included was to filter included files in the scheme to state the media type is video or data.
To get the files in to MC in not so simple as I was not able to auto import the files (I have not figured how to do this yet, any ideas would be greatfully received), I had to drag and drop them in. Once they are in I could then edit the fields as much as needed, mainly being that the Video Sub type was Video Game and the Media Type is Video.
Go into thearter view and voila you have a list of games in the video section under the sub type and selecting to play runs the bat file. It also works for lnk files as well.
Now the problem is that the games all use the horrible command icon that is associated with BAT file and found that MAME could take a snap shot of the screen straight into the clipboard and wanted to use the snap shot of the game as the cover art.
To add the cover art I had to change the media type to video, this provides the cover art options and then use the option to paste from clipboard. As the file can not incorporate the image then MC stores this in your cover art folder. Change the media type back to data and the cover art is still there.
Hope this helps.