Hey guys, It's actually pretty easy to set up tab with the spacebar + fn key combination. Run kgb controller, hit menu add key, check off "combine with FN key" and press the spacebar. In the settings page go down to where it says "action" and select "Emulate key press". A few more options have now been added.. for "Key" select "9 Tab". Hit ok and update config for it to take effect.
You can also do Fn + c for copy, Fn + v for paste, Fn + x for cut, Fn + a for select all,and so on all the same way. just make sure you check off "ctrl" in the settings options for each