Hey daniish,
I’ve just received the first alert from this forum in… about a month. I hope I’m not too late to help, though I still probably am.
The following scripts get used and can be found in your WP_DIR/wp-content/plugins/masonry-post-gallery/ directory.
cactus-masonry.min.js
imagesloaded.pkgd.min.js
lightbox.min.js
masonry.pkgd.min.js
spin.min.js
You can manually handle the loading of Cactus Masonry’s scripts if you want. If you set load_js="false" the plugin will not attempt to load any scrips, allowing you full control. If you do this, you will have to load the scripts manually, but you can choose where and when. Cactus Masonry also requires jQuery and starts executing its JS when the document is ready.
I hope this helps,
Cheers
