Here's a good link about that Photoshop channel mixer method: http://www.tutorialelf.com/Infrared_Effect_Adobe_Photoshop_Tutorials.html Although it looks like an exact replica of Joe's tutorial... ;o))

We do not see things as they are. ǝɹɐ ǝʍ sɐ sƃuıɥʇ ǝǝs ǝʍ