Deadhuntr, the term you are looking for is mod-foldered, the use of a new icon doesn't necessarily mean a mod doesn't overwrite your existing installation.

I don't think this mod is in a mod-folder unfortunately (though I could be out of date on that!) if you don't want multiple installs or to try and use a mod-switcher, you could look at RTR Platimum Edition or Chivalry TW, for RTW. EB I think is mainly modfoldered but has some overspill, there are more options if you have Barbarian Invasion as well...