Keyboard isnt identified as the correct one

Hello,

I bought me a new Logitech keyboard for the imac because im used to the keyboards for most regular pcs. I just need it to program. It is being identified by macosx but just as the wrong one! I cant use alt+gr how can i specify which keyboard it is ? the choices arent enough, there are only 3 when I try to do it manuallly.

thx for your help!

Have you tried installing the software that came with the keyboard, or have you looked on Logitech's site for OS X software?

I just went on their site to check if they have any drivers. They do but only for Windows Now what could I do ? (Btw it's a logitech flatkeyboard )