Dimucus, may I ask a favor?
This is what I've done so far:
For the IXB, IXB4, IXC, IXD2 subs I've changed the cfg for Salvo to now show I, II and III, IV instead of stock settings.
Also I have changed lines 1174 and 1176 in the de and en_menu .txt to change the salvo for lines 1174 and 1176 to now show I, II and III, IV respectively. The changes work fine as I have tested it in Single Mission. The only thing that was different was your mod. I didn't try any firing in Salvo as I wasn't sure if there would be a conflict and cause a CTD. I tried to change these settings in your mod but they wouldn't take. If they had worked I'm not sure what other changes would have been necessay in your mod.
The change I'd like to ask from you is in your TW_PeriTDC_For_GWX.7z mod to reflect the same if you would. Some of us feel that Slavo for 1/2 and 3/4 is much easier and seems more realistic to use. And you don't have to move torpedos when setting up your career so they are matched in tubes to use Salvo. That's the favor I'm asking. If you don't want to that's ok too.
Other than that your mod works great. ~S!~