I have the RAT5 and am running linux mint currently. I tried the old change xorg.conf trick, and it worked on normal ubuntu, but after moving to mint, the same trick doesn't work anymore. This is what is currently written in xorg.conf:

Section "InputClass"
Identifier "Mouse Remap"
MatchProduct "Saitek Cyborg R.A.T.5 Mouse"
MatchDevicePath "/dev/input/event*"
Option "ButtonMapping" "1 2 3 4 5 0 0 8 9 10 11 12 0 0 0 0 0"
EndSection

Any help would be appreciated. Thanks in advance.