Lets start off by saying thank you very much for your timely response & for the welcome! I was checking my email for the response but I guess I didn't check that option.
Xcom has a LOT of great content & background implied that I love. A group of government officials pool some recources as they see evidence of the coming threat & instruct with "search" "destroy" "you're humanities las hope" & throw in the human operators in the nuke silo cliche & boom you're playing a game of survival with a globe in front of you. (Very cool!
Now that I've got a feel for the direction of the replies here's what I have. The following is a "screenshot" of a dos editor filename "XC2ME2.EXE":
XCOM 2 Multi Editor v0.2 by Khor Chin Heong (email@example.com)
1. Weapon Editor
2. Ammo Editor
3. Armor Editor
4. Alien Containment Editor
5. Base Facility Editor
6. Sub Editor
7. Sub Weapon Editor
8. Alien Editor
I have the windows version of Xcom1 & when I select option 7 it says: "Error opening ufoexe\geoscape.exe"
which I expect is a part of the Dos version. This may actually be the editor I'm looking for but I don't recall ever having a different/another version of this game.
The other one I have is a shareware one filename "XCOM2ED.EXE" "Xcom II Terror From The Deep EDITOR V.1.1, 1995 Arrow Computer Services". Some of the items that are unlocked for the registerd versions are "TANKS AND ARMOUR AQUANAUTS" and " SUBS & SUB WEAPONS". I haven't tried registering it of course ;-)
I checked the editors mentioned & changing the characteristics of a sub/plane weapon does not appear to be an option... & apparantly my email address is correct & I didn't get notification... I'll have to check my spam settings
This is where I am, I hope that helps & thanks again for the reply & assistance Zombie & Mazdek.