So here's the thing. I like Coppermine and all the features it has, but I'd like to make my own skin that matches my site. I know I can manage to make my own skin using XHTML and CSS, but I don't know any php. Is there anything I could to do add all the php scripts in and still have the whole gallery look right?
no PHP knowledge needed. Go to the demo, choose the theme that gives you the closest match (using the "choose a theme" dropdown), download the theme (if it isn't one that already comes with coppermine) and start modifying the theme by changing themes/yourtheme/style.css and themes/yourtheme/template.html
In most cases, this is all you need to do - only plain html and css there, no php knowledge needed.
For further details, post a link to your site.
Joachim