What I did to your shot was done with a trial version, so it's very simple. The program I used is Microsoft Digital Image Suite 2006. Under "Touchup" is an option called "Adjust Color". You select that and then use the dropper to pick an area that should be gray. Since there wasn't anything specifically gray, I chose a darker section of snow. Voila! After that, I just bumped up the saturation a tad and that was it. You can do pretty much the same thing in Photoshop. In Elements, I use "remove color cast" to get rid of it.
I don't have Photoshop, just Elements 7 so I can't give any good info on how to use that one. But yes, the adjustment is similar to RAW except that by clicking on something that should be gray, it also will adjust the hue by specific color. White Balance just adjusts the temperature of the shot as a whole.