4
Go into the template (through admin "Template Manager") that you want the space to show around the pictures (Of course you will need to clone the templates before editing.) Enter the following before reference to images:
le="color: #000000"><?php <div class=whatever>
And then close it at the end like:
le="color: #000000"><?php </div>
Then open your CSS editor and make a new class of .whatever and enter your "padding top left right bottom" to around 8 pixels or whatever you want. That should work without effecting any other images on your site.
If you haven't done it yet, download TopStyle lite (google for it) it will help guide you through the class creation process.
HTH.