Binding 2 buttons to C Buttons

[ckyizzzle]

Hello,

I think this should be pretty simple to do with NRage's modifier bindings, but I can't seem to figure it out. I have a ps2-style USB controller. I want to bind the C-Buttons to ---> Up=R2+Triangle; Down=R2+X; Left=R2+Square; Right=R2+Circle.

It's the same style that RetroArch uses for their default controller bindings. I just don't see anyway that you bind 2 buttons on a controller to 1 N64 Button. Am I missing something?