A quick workaround for this is to depbo and drcrypt the data3d.pbo ( or the O.pbo and use the NEW forest shape that doesn;t have the blocky lods) with the pbo tool above, and find the p3d that was used for the forest that your looking for. Then hexedit the new p3d to replace the location of the textures it will be using to the location where the new textures are at, either directly in the addon or within a folder within the addon. For example in the original p3d the original location for all of the textures was "data\les_whatever.pac or paa" so in a new island you would do a global find and replace for the word data and replace it with the location within the addon where you will be storing your textures. Very simple stuff once you do it once or twice. Just hexedit an edited p3d to see the naming structure.