I have one PAL GameCube game - the Resident Evil remake. I have two of the older version Freeloader disc's, version 1.06 and 1.06B. The version is printed on the inner ring of the disc's.
On the older style GameCube with the digital out, both versions allowed the selection the game region by pressing the Z button on the controller. Both versions booted Resident Evil to a color screen - with rolling text. The game then asked if you preferred to play in 60Hz or 50Hz. It was not necessary to hold down the B button to bring up this option.
On the newer style GameCube that had the digital out removed, only the 1.06B version worked. Version 1.06 gives an error message asking you to restart the console.
I thought this information may be of help to someone choosing the correct version of Freeloader for the type of GameCube they used.
From what I can see, the Freeloader only allows the game to boot up in the console, but does nothing to allow 50Hz games to play properly. It is only the games with a 60Hz option that will play without the rolling screen.