ghostsonic is right. you can do this without fear, as it is number 2 that executes the install. button mash 'b' and '1' until the options appear, i found 3 or 4 times the charm.
i have also found that the 'wii region free' and 'skip update on disc' options both cause games, that have had freeloader injected into the iso before burning, to lock up. these could still be loaded via gecko os, as long as you insert the disc after starting gecko os.
most games i tried with the 'wii region free' turn on worked, but games like 'wii music' and 'jillian michaels fitness ultimatum 2009' still needed gecko os to run
i also noticed that after i turned region free and update skipping off, some foreign games that needed gecko os to run before, began running without gecko os, like guitar hero world tour, and tenchu 4.
a fine bit of software tho, removes the annoying health warning and background music, also removes the need to freethewads with region free channels