Go ahead and install the ICM file. It won't overwrite, wreck, or lose anything - it'll just another option on the list to select from. At worst, it just doesn't work or looks horrible and you decide to go back to the previous settings. (Well, at very worst, it somehow makes the display unusable and you have 15 seconds to press Escape to revert to previous settings - but that's not very likely for a color profile, lol.)
"All opinions are not equal. Some are a very great deal more robust, sophisticated and well supported in logic and argument than others." - Douglas Adams
[/Korth]