Hi Kel,
Depending on what you want, basic software can be found on line.
If it's something like Drift's then you'll need to create some pics all slightly different (imagine you doing one of those flick cartoons on the corner of a book), idealy a minimum of 4, and sequence them together as a .gif image
There is a free online creator available when you have the images or photos
http://www.createagif.netWhile basic it does the job, and can even store online for linking to

This was done in under 2min and is an example only. You can make them bigger, faster. You'll have to play to get the best results.
If you want a custom image like bobbinjob's then you need better image software.
There is plenty of free or free to try stuff around. Sorry I can't point you in the direction of any. Will have a look later if time allows.
If the gif image is what you want, I'd PM Gareth and see if he would take some sequenced photos of the car moving at the next picnic
