Isn't it possible to use the virutal path mapper for a whole directory? I want to use images in an Editorplugin, which requires them to reside in ~/App_Themes/..., so I added a map for "~/App_Themes/Default/Images/editor/MyDir/" to "~/Plugin/Images/editor/". But it only works if I add on for each file, like "~/App_Themes/Default/Images/editor/MyDir/myfile.gif" to "~/Plugin/Images/editor/myfile.gif".