Heyyo,
Got one tip for ya mal: make a .bat file that starts rtcw with frtiz.
simple, just like in your readme, just create a frtizbot.txt and put in:
wolf.exe +fs_setgame frtizbot
then save n' close it n' rename it from .txt to .bat and now once you execute that .bat it should start rtcw with fritz. It works no matter where the game's installed as long as they extract it in the right directories eh?
I've seen this done in many Q3A mods like Doom3, and even Q3A.