The links should all work now. They should get you started. There should be plenty of info now on what you're trying to do. The forum is really good about finding people to answer any questions you might have.
I hope it helps someone out there!
I use a great free program called the Gimp and have recommended it to many others over the years. Tutorials are available for The Gimp on the net and fairly easy to find. I have provided links to a few sites that have tutorials below. It is definitely HIGHLY RECOMMENDED for you to try to find one appropriate to what you are trying to do.
Downloading, installing, and using The Gimp:
If you have any have issues, there is a decent FAQ for troubleshooting Here.
Once installed, you will WANT to check out the tutorials Here.
Last, but not least, other tutorial sites:
Cutting Out Renders Using the Paths Tool Click Here
GIMP FORUMS - GIMP help, tutorials, general gimp discussion & new features Click Here
Well, that should be enough to get you in trouble. Hope it helps!