Actually, if you are using Drox then you want to be sure Infomap is completely extracted into \Sony\Vanguard\VGUIAssets\Shells\DroxUI\Map.
Then be sure that your index.xml has the following section in it still (as Drox supports the generic map format)
Code:
<!-- Support for independent map projects -->
<GameplayWindows directory="Map">
<Window filename="VGUIMap.xml"/>
<Window filename="VGUIMiniMap.xml"/>
</GameplayWindows>
and also in skininfo.xml
Code:
<!-- Standardized Map Skins -->
<AnimationDefinitions directory="Map">
<AnimationDefinition filename="MapSkin.xml"/>
<AnimationDefinition filename="InfoMapSkin.xml"/>
</AnimationDefinitions>