Nice new utility to make custom missions!
http://www.jimmyarcade.co.uk/coldwat...BuilderADV.asp
You will need to create a folder structure in your override folder,
Steam\steamapps\common\Cold Waters\ColdWaters_Data\StreamingAssets\override\la nguage_en\mission
The Mission Briefing File goes there.
.
The Mission File goes in your Cold Waters/ColdWaters_Data/StreamingAssets/override/ folder
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And make a copy of the Cold Waters missions_single.txt file which you can find here: C:\Program Files (x86)\Steam\steamapps\common\Cold Waters\ColdWaters_Data\StreamingAssets\default\lan guage_en\mission
Save that copy in Steam\steamapps\common\Cold Waters\ColdWaters_Data\StreamingAssets\override\la nguage_en\mission
and edit it with the new missions titles.
When you make new missions, you may want to rename them with new number file names, such as single014.txt and single015.txt, etc.