doubtful autogen and questions

Creation of a scenery: Through Ground2k roads can be created, rivers, polygons VTP etc. Through annotator they is able "autogen" of the personalized landclasses (custom 253). With PSM texture custom fotorealietiches are realized. With Gmax it is possible to create determined objects and to position them where he believes better. Problem: in Ground2k if a landclass is used 253 it is not more possible to use (on that landclass) polygons VTP. With annotator even if it is possible to add houses and buildings to the landclass, opposite, the addition of trees also positioning at the most the densit