>Rıght handed: (F1)
xmodmap -e ‘pointer = 1 2 3’ & synclient TapButton1=1 & synclient RBCornerButton=3 & gconftool -s /desktop/gnome/peripherals/mouse/cursor_theme -t string ComixCursors-Black-Regular

Left handed: (F2)
xmodmap -e ‘pointer = 3 2 1’ & synclient TapButton1=3 & synclient RBCornerButton=1 & gconftool -s /desktop/gnome/peripherals/mouse/cursor_theme -t string ComixCursors-LH-Black-Regular