Here are the instructions I have put together for making the slide card as in this card I made.
Decide where you would like to have the sliding image...In this example (pictured) I decided I would put it 25mm up from the bottom of the card.
Cut two parallel lines 10mm apart* stopping at least 10mm from the edge of the card. I used my CM 12" cutter but you could draw the lines using a ruler and then cut the lines with a craft knife.
You then need a piece of card 10mmX30mm. Fold it around the track and fasten with a glue dot/ adhesive.
Attach your stamped (+ coloured) image to the front of the sliding card piece.
Turn the card over and attach ribbon to the other side of the sliding card piece
Check that the images slides both ways! Now decorate the card as you wish!!
You could stick card on the inside to hide the ribbon if you like. It makes it a bit neater and also makes the ribbon sit neatly at the sides.
*this could be smaller - I just realised that the magazine I originally looked at said to put it 3mm apart. It might be a good idea to use a smaller width for smaller images.
This is my first attempt at giving instructions for something on the blog... let me know if they are unclear / don't make sense etc :)