No, did not help. When I look at the texturefile generated by the Terrain Texture Generator, it's a text-file: xxx.txt.
Contents;
auto_update_skin = 0;
creation_flags = 52;
camera = -54.955048 -503.635345 18.790649 -2.362637 -3.251891 18.557415 -6.210366 -59.087631 272.504578;
texview = 0 15 1.000000;
texture = "C:\Program Files\GStudio7\template_6\images\grass.tga",axis = 1,pos = 0.000000,x_offset = 0,x_offset = 0,x_scale = 1.000000,y_scale = 1.000000,rotate = 0.000000,influence = 1.000000;
texture = "C:\Program Files\GStudio7\template_6\images\sand.tga",axis = 1,pos = 0.100000,x_offset = 0,x_offset = 0,x_scale = 1.000000,y_scale = 1.000000,rotate = 0.000000,influence = 1.000000;
texture = "C:\Program Files\GStudio7\template_6\images\rock.tga",axis = 1,pos = 0.700000,x_offset = 0,x_offset = 0,x_scale = 1.000000,y_scale = 1.000000,rotate = 0.000000,influence = 1.000000;
current_textxure = 2;

I have no clue where to go from here.