Can we/how do we add icons/images for icons in the game? For example, for ship modules? 

I know the xml looks like this:

    <GuiElement Name="StarSystemImprovementMerc1">
        <Title>Merc Outpost</Title>
        <Description>Outpost where mercenaries can be contracted.</Description>
        <Icons>
            <Icon Size="Small" Path="Bitmaps/Dynamic/Improvements/StarSystem/StarSystemImprovementDefense1Small" />
            <Icon Size="Large" Path="Bitmaps/Dynamic/Improvements/StarSystem/StarSystemImprovementDefense1Large" />
        </Icons>
    </GuiElement>

I'm looking for what the highlighted lines should be changed to in order to use our own images, and what the requirements are.

Thx for the update! Can you tell me which icons will repect the "color" xml config?