I can't figure out the tutorials on how to edit map files to include a custom gun, say MG6 Magnum, and I've been tinkering with it for a while trying to see what I could do, maybe learn through trial and error like I've been doing but all I did was break my map. I know that the script files are in the iwd's but I'm having trouble on finding out where the scripts are to be placed, and what you need to do have it inside of a random box, etc.

Any help length of help would be appreciated, I've downloaded the mod tools about a week ago and I've really come to enjoy them.

do you need help with the gsc files or the map on radiant?

It's hard to understand the installation of custom weapons, as well as knowing where to change specific UGX scripts to allow new weapons to show up in the box, or as a new starter weapon.
Another question too, why do you put this in the weapons.csv in raw? Does it go into your packaged finished map and run its own modded raw file separate from the actual raw files?
What goes into weapons.csv
halo_magnum_fire_pap_npc,,SFX/Weapon/pistols/357/fire/wpn_357_st_shot.wav,,0.7,0.85,500,4000,10,priority,2,oldest,rfl_3rd,,,,4000,,,0.98,1.02,,3d,,,,0.7,,,,,,,,,,,,,,,,,,,50,90,0.35,1,,
I'm using UGX standalone for my map.

mah boy if you port a gun make sure you make your own soundalias instead of including it to weapons.csv......
it is a waste of time...
secondly, make sure you have dlc3_code and _zombiemode_weapons gsc files to your mod folder.....
these files are the scripts where you include your weapons