Thanks, so in awe.cfg:

// Secondary weapon (0 = pistol, 1 = select from same team, 2 = select from the other team) (default 0)
set awe_secondary_weapon "2"

When I want a working line just what I need is remove // from de begining, isn't it?
Is that the only line what I need to modify and find what I'm looking for? thanks again..

That's correct.

In the sample awe.cfg, all dvar definitions are in comments.
This way all dvars have initially the default value.
If you want to change a setting, remove the comment symbol // in front of the line.

This was Bell's idea to save dvars, knowing that COD2 has a limit of 1280 dvars.

About weapons, you might also be interested by the all weapons menu. When activated, every player can select any of the available weapons (all stock weapons + all pistols + 2 MGs + 2 rocket launchers + scoped G43).
See "Weapons menus " in awe.cfg.