Rob, Which version of PS are you using. The latest version, CS, has a neat tool that might be helpful. It's the Shadows/Highlights tool.
Check put Katrin's site for openers: http://www.digitalretouch.org/ Shel Belinkoff > I have been using a dedicated application HDRShop to perform this function and > it requires absolute registration or else it turns into a nightmare. The > slightest movement in branches on a windy day causes coloured spuriae to be > rendered in the difference areas, not nice. I hadn't considered Photoshop as > the stand alone application used some pretty heavy manipulation which is well > beyond layer additions and simple masking. Do you know of any on-line tutorials > etc?

