Make custom mouse macros to keyboard ? [something is hidden here...]

I don't see it as a cheating, almost every $25+ gaming mouse has that button, but unfortunately I cannot afford one now, because I want to buy professional sound headset.

Yeah, but do you know how to type the command :D

:D Too bad that TF2 ain't team game. I need the single-shot key for cs:go. :/

I actually use now fastclicker, but it aint not the best. And no, tapping the mouse button has few microseconds latency automatically and the single shot is almost 0 seconds. It's very useful for throwing grenades, since the delay of 0.2 seconds for example is sometimes way too much.