Overture: Extra mouse button support.

[FROG]

Hello, I own a Logictech MX518 that has two extra mouse buttons on the side. I'd like to use these for flashlight and glowstick in Overture but the game does not recognize them as keys by default in the control options. Was wondering if there was a way I could edit the config to be able to use these buttons. Any help would be appreciated. Sorry if this has been discussed before.