Infrared Photography IR

Has anyone worked with Infrared Photography also known as IR Photography? It's a new technique I would love to learn but filters are very expensive and I only have one DSLR that I would never alter just for IR Photography.

I've been asking around and haven't had much of a response but is there another way to achieve this affect? Maybe via Photoshop Elements? I don't have Photoshop CS5, but PSE9 works pretty well for me considering I also now have Topaz Labs.

If you are interested heck out this link on IR Photography:

http://mansurovs.com/introduction-to-infrared-photography

Notice the ethereal almost spooky colour. Photoshop is used here to achieve the final result but I don't know if all of the result can be achieved in Photoshop alone.