i read on POTN that it is helpful to download and install the ICC profile for my local Costco from www.drycreekphoto.com - i did download it but and I clicked it, a dialog box popped up and asked if I want to install the profile, so I choose to install it.
Now, this is gonna sound dumb: but how do I use it? and how do I know that it's working? I have Photoshop CS and I use Adobe Lightroom beta for most of my PP work. I just really don't understand what the ICC profile actually does. does it automatically do some color adjustment behind-the-scenes, or does it require that I mess around with it?
can someone please explain this ICC profile thing to me?