Well, for starters, you'll need a more robust image editor than paint. There are ~ways of obtaining Photoshop or Paint Shop Pro, but if you want to stay legal, you'll need to use GIMP or one of the online Photoshop clones like Sumo Paint or Pixlr. They look scary and there is definitely a learning curve, but once you get used the process, you'll be able to do it in your sleep.