Well, there's this command that allows you to load weapons.ini while in-game. It's in the last place you would expect, the
Soldat Manual. Don't mind the bitter sarcasm, I'm just in kinda a bad mood.
Anyway, the comand is
/loadwep xxx
where xxx is the name of the file xxx.ini (so typing /loadwep HAX would load the weapons settings from the file HAX.ini).
I'm sure you've already figured out how to use a weapons editor such as one in
this topice. It's pretty simple, and unorthodox weapons can be found in
this topic.
If you want to get a weapons.ini to load when you play a mod using the -mod parameter, just place the changed weapons.ini inside the mod's folder under the name weapons.ini. So, the path for the L33T MOD's changed weapons would be something like C:\Soldat\Mods\L33T MOD\weapons.ini.
You can load weapon stats on the server by simply loading the stats while in-game with the /loadwep command.
Hope this helped.