Step 1: Reusing and Recycling
The digital photo frame was sourced from Gumtree and cost me £4, though I've bought them cheaper since then for other projects.
I had the idea that if I built the frame into the TV it could sit decoratively on my desk showing a slideshow of TV-related images to match its own era.
Step 2: Internals
The photo frame being modern was more of a snap-apart job, but the internals came out cleanly.
The frame chassis fitted well in the gap left by the tube, secured here with blu-tac and later hot glued. It wasn't an exact fit however, a bit of the screen was hidden to one side.
I didn't need to repurpose any of the switches for this project as the frame comes to life and starts the slideshow as soon as the power comes on.
Step 3: Images
The web images were all different shapes and sizes, and obviously would be partly hidden if shown full screen. so I adjusted them in a photo editor to make the image display centrally in the visible portion of the screen.
The images transferred easily to the frame on an old 128mb SD card.