Due to "Shadowbox license expressly prohibits such redistribution" the plugin download is no longer available. Sorry. The only way to have this plugin is for you to create one for yourself and I'll write up the procedure when I have time...

Create your own ShadowBox plugin

Since the shadowbox has been updated frequently in the last few weeks, this one is for version 3.0.3, please go there to download all the files, make sure you select the base stand alone version and all the options available (check all)

Unzip this zip file, you will get a folder "shadowbox3.0.3/shadowbox3.0.3", get the inside folder (the folder that has all the files) and rename it to "shadowbox", move this whole folder to your nucleus plugins folder (http://yourdomain.com/yournucleus/nucleus/plugins/). Now we need the NP_ShadowBox.php.zip, download and unzip the file to the same plugin folder (NOT inside shadowbox), for the thumbnail, you need this thumbnail.php.zip, download and unzip it to the "shadowbox" folder (INSIDE shadowbox).

Now go to admin page, you will see the NP_ShadowBox plugin, and install it like normal. This version 3.0.3 seems to have the JWplayer in it already. Go back to the ShadowBox plugin for usage. For all the CSS3 glowing outline, I don't know how...