I've read a property from the registry, and that property has been set properly (I'm using this to check the property value)
<CustomAction Id="Test" Script="vbscript">
<![CDATA[MsgBox Session.Property("MYEXTRAFILESFOLDER")]]>
</CustomAction>
Now I'm just trying to drop a few files into that folder. I can't figure out how to make a File element target a specific directory.
As I get you don't need to change taget path in general but only put some files to specific folder. Easiest way is to create custom action.
Another option is
Also this can be an option too. But I don't know how it works exactly