Ok wow. I got it to work now! It seems that first you _must_ install the latest driver 7.3.7 (+ I also installed L6 monkey 1.68 and license manager 1.08). Then you use the commands what TheRealZap posted above to remove a part of the driver but _do not_ remove the driver files that are left behind (Which was what I was doing by using the instructions in the link I posted). And lastly you use the instructions in the 1st post to install the .pkg's in gearbox 3.72 (You probably cannot install the uninstaller or L2 monkey since a new version is already installed). Phew!
The interesting thing is that when I check L6 monkey for the driver version, it says 7.3.7 :D
Oh yeah: Thank YOU uslimey and TheRealZap! You are the greatest!