Well, I’ve officially been outdone! Brad Guilford has updated Texx’s coppermine plugin again, and, it’s so good, that I’m using it on my site now!
Brad seems to have made all the changes that I had (including linking directly to the coppermine page, rather than a popup window) and has added a number of other new features!
You can check out Brad’s update to this plugin at 55 Rue Plumet. So, until I find something that needs tweaking in Brad’s version, I think I’ll be quite happy to continue using his!