Mouse control and shortcut keys in Concept 2.5

Does anyone know how to get the thumb wheel on a mouse to work in Concept 2.5? It would be nice to be able to use the thumb wheel to scroll the page display up and down, rather than using the side bars. Is a special driver needed?

And does anyone know how to set up shortcut keys (eg Alt F7, Ctrl H) to carry out functions in Concept? In particular, is there a shortcut to the \Objects\Replace Variables command?

Thanks in anticipation.