weapon coding questions

[Freemanoid]

All greetings. I want to set some questions.
1) How to make so that the weapon moved to the left to the right at movement of the player (as in Quake 3) ?
2) How to make so that the weapon slowly moved to the different sides when the player stands on a place?
3) How to make so that during shooting the screen twitched (feedback from the weapon)?

I am creating game for PPC so such programs as darkplaces cannot be used.

[Lardarse]

[Freemanoid]