To use them...
1) drop pictures inside of the StarCrawlers image folder
C:\Users\user name\AppData\LocalLow\Juggernaut Games\StarCrawlers\Images
*if appdata does not show, then you need to turn on "view hidden views"

2) Go into the game, go to your character overview, then you will see a small icon that say "edit" bottom right corner of your portrait, click on it.

3) now enter the portrait file name and click the disk icon next to it, one at a time. When you do, you should see the picture automatically update.
*character picture is a number
*event picture is the number and the letter e
*combat picture is the number and the letter c

For example...
01
01e
01c

This will give the 3 different pictures for your portrait.

Enjoy the game and make sure to let the devs know the game is awesome :)