I wanted to do something similar — you can remove the transparent overlay pop-up by editing the javascript file in the ‘shutter’ folder of the plugin ( In my version, it’s called shutter-reloaded.js ).
Find and comment out this line:
L.onclick = new Function(‘shutterReloaded.make(“‘ + i + ‘”);return false;’);
Note that I think this will revert you to the next layer of click behavior which is to link you to the image file. I didn’t find out how to disable that, all I was trying to do was change some aspects of the overlaid pop-up, which I was able to do by editing the shutter css.
