Hello everyone. I am new to this forum and so far I enjoy visiting here daily(hourly) and learning new techniques about photography. I teach photoshop and I'll be honest HDR is new to me. I am wondering what my best option is for doing HDR? Can I get a plug in for Photoshop CS4? I do not have Lightroom. Should I just buy the full version of Photomatix? I have Aperture version 1.5.6 Any help would be greatly appreciated.