There are different commands for skin change and for gamma change, so really the skin needs to have support for it (the BFM skin does for instance). You can most definitely make your current skin do both the gamma change and the skin change at the same button press.. for this, simply edit your menu.skin file and where you see "GAMMA" change it to "GAMMA||DAYNIGHTSKIN" -- You should do that both with your Day and Night Skin. This will make RR switch the gamma and then the skin. The only thing you should watch out for is that if you exit RR in the night skin (with lower gamma), RR will "remember" your last skin (night one) and restore it without the gamma (auto gamma not yet implemented). If this happens you can simply delete your resume.ini file and RR will load the day skin and gamma by default.