OK, to answer ure melee question better, u can either read the manual in the esf folder, which should be called ESF Manual.swf which can be opened with Internet Explorer or u can read this:
1. Select melee as your weapon by pressing 1!!
2. Look at an opponent and press your Primary Attack button, left click by default, when ure crosshair is over the opponent!! If you did it correctly, a red box should appear around the opponent u just targetted!!
3. Look at the targetted opponent and press and hold the Primary Attack button(left click by default), and right afterwards, press and hold the Secondary Attack button(right click by default)!! Do not let go of either of them until you kick the targetted opponent or u fly past him!!