Greetings, Alex.
1. In game saves can be done with one line of code: saveGame. You can put this in a trigger, in a script, or even in a waypoint (but remember, never use player waypoints for scripting, as the player is a random element - and also because waypoints do not appear in Veteran mode). What many people do is to create a trigger, set it to one of the radio channels (e.g. Radio Alpha) and put the code in the "On Activation" box. So:
Condition: this
On Activation: saveGame
See? Easy.
As for the weapons selection, I assume you're talking about choosing weapons during the briefing? If so, it needs to be done in the description.ext file. I'm not going to go on about it here because it's fairly well documented (and because description files were never my stong point). Searching on the forum or in the editors depot should reveal a solution.
Alternatively, Chris's OFP Script editor has a description.ext generator that will create the whole thing for you, complete with custom weapon selection.
That should solve your problem :thumbsup:
-Supreme Commander PsyWarrior
-Psychic Productions Studios