How to Add a Border to a Picture in Photoshop – eHow.com: http://www.ehow.com/how_6395_add-border-picture.html
Ok, so I’m only talking about Photoshop Elements 3 (or 2) here, and without it I doubt I’d have been so happy to give up my 35mm film camera, but boy does it make some simple things hard. For some reason, with PSE3 Adobe have put in loads of ‘Wizard’ style helper boxes for colour shifts and the like, despite the very easy and obvious colour space tools (like Hue/Sat layers). They didn’t, however, see fit to let me draw a square box with a simple tool.
Ok it’s not the hardest thing in the world, and maybe my brain is failing, but I had to use the above tutorial to get anything like the result I’m after. In fact, it’s not exactly right even now, but it’s so much closer than anything else I just don’t care any more.