You could either try a free photo/paint porogram, such as 'The Gimp' (click here).
The other option (other than Photoshop) could be PaintShop Pro. Version 8 is available for under a tenner, and version 9 is under £40! I use version 9 and I think it's great, but version 8 was brilliant too. For £10, you just can't go wrong (click here to check them out).
Although I have no desire to do it, I have just tried it in Paint Shop Pro 8 - works OK.
I also have Professor Franklin's Photo Effects (came free with an Epson printer a long time ago) This programme has all sorts of instant photo effects. Have used it quite often to get "edge effects", "different lighting effects" "sepia" etc. Not free but click here
You will find it probably can be done with Photoshop or Paintshop Pro, you have to follow set procedure to do it - its NOT a one shot menu item. Digital Photo mag £5 per month ( V Good) has covered this using Photoshop I seem to remember. David