General modding instructions
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Moddir and graphics files
This guide explains how to use the moddir with graphics files.
Where to find things
Units: Hearts of Iron 3 -> units
Technology: Hearts of Iron 3 -> technology
Text: Hearts of Iron 3 -> localization
Most modifiers and tweaks: Hearts of Iron 3 -> common
The DDS files are in the following format: 220.127.116.11 ARGB 32bpp unsigned (making sure alpha channels are on)
Change Game End-Date
Change Game End-Date explains how to change the end-date.