It has to do with your folders. The structure you are using will make this unnecessarily complicated.
Although you can do it, the easiest way to use GBBM and most other themes is to have “genre” folders that contain lots of movies. Your structure of having each movie in its own folder is making this complicated. The only reason I would use your structure is if all of your 900 movies are in VIDEO_TS folders. If you are in formats where each movie is just one file, (ISO, MPG, AVI, MP4 etc.), having them in “Genre” folders is MUCH easier.
The genre folder linksheet is saved to the theme root with no extension. The movie’s linksheets are saved with the moviename and same extension to the themes root. The movies cover has the same name as the move and a jpg extension and is saved in the same folder as where you are keeping the movie.
Here is an example of a Genre Folder called "Action"that contains four movies and their respective DVD covers. Then the Theme’s Root and the files that would go there that corresond with those four movies and the Genre Folder.
1) This is the “genre” folder of your movies on the HUB or a network drive. These are the actual movies, and the jpg of the DVD cover.
Action Folder
–>12 Monkeys (1995).DVD.mkv
–>12 Monkeys (1995).DVD.jpg
–>Cowboys.and.Aliens (2011).DVD.mkv
–>Cowboys.and.Aliens (2011).DVD.jpg
–>Fight Club (1999).DVD.avi
–>Fight Club (1999).DVD.jpg
–>Leon.The.Professional (1994).Bluray.mkv
–>Leon.The.Professional (1994).Bluray.jpg
2) This is the matching files in the root of the theme on the HUB. The “folder” linksheet (Action) is a jpg made in TG that has had the extension removed. The movie linksheets are also jpgs you created in TG that you have changed the extension from jpg to match the extension of the actual movie. All of the below that are inside the themes root are really linksheet jpgs that you have changed the extension on.
Theme’s Root folder on your HUB
–>Action
–>12 Monkeys (1995).DVD.mkv
–>Cowboys.and.Aliens (2011).DVD.mkv
–>Fight Club (1999).DVD.avi
–>Leon.The.Professional (1994).Bluray.mkv
I am assuming you know this but note that the TG Template for folders, is different than the TG Template for your movies. For the GBBM theme you are using, the two templates are “Black Mamba Folder Sheets by DeVicious” and “Black Mamba Final Movie Sheet by Devicious”. You will be choosing your template under the “Current Profile” dropdown menu (top left) in Thumbgen.
I feel for your frustration on this, it took me a while to get it down as well. Though it may not be your only issue, your folder structure is the first thing to fix.
How about trying a test first. Make one “genre folder”, whatever you like (Action, Comedy, Drama etc) and copy three or four movies into it. Run TG on the movies. Keep the DVD covers with the movies. Find the linksheet which will be one folder up and rename the linksheets extensions to same as the movies, and copy to themes root. See if that works. Worry about the folder’s sheet later. Just get a few movies working as a test.
Let us know how it goes
-P
ADDED:
Since you seem to have this somewhat working, I have been assuming you know what I mean by the “Theme’s Root”. If not, it is the GBBM directory that is on your HUB. The actual path is below. The top level directory (.wd_tv) is hidden. To see it you must view it from a computer that you have turned on “view hidden files/folders”
LIVEHUB> .wd_tv / theme / Goodbye Black Mamba Theme / (your linksheets go here)