[EDIT] Darn, somepony took your cake, go ask them for another one ^^
Just pass www.youtube.com/watch?v=_IbgTP… (this is from Office Space BTW)
origin (as far back as I can see)
1. Make a screenshot of the page.
2. Open it in paint. (Photoshop)
3. Open a base and colour it in.
4. Select Transparent selction in paint. (oops)
5. Make sure you colour every white space INSIDE of the base another colour, you can edit this later (I reused one of my vectors instead)
6. Move your pony into the screenshot.
7. Save it as PNG and upload it. (JPEG)