[wp-hackers] print_media_templates & filtering SPECIFIC post galleries by ID

[BenderisGreat]

I am trying to add a feature to a plugin, and just got stuck yesterday on how
to identify the specific post gallery ID that an option is being set for. 
In a nutshell, I added a checkbox to the Media Gallery ( see bottom right
checkbox here:  http://postimg.org/image/g423ozl5l/
<http://postimg.org/image/g423ozl5l/>   )

Now, I would like that option value to coincide with the specific post
gallery ID for filtering when the post is loaded.  This is where I am stuck. 
The print_media_templates filter accepts no arguments, and returns no value. 
So, I am not sure where the saving of that option value occurs at, or where
the galley ID is returned to.  

Could someone lend me a pair of eyes and share any possible solutions?  



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