First, big "Thank You" to Arno for this tool making our life much easier !!! Minor two issue I have is as follows; 1. upgrade mdl. I created a new user library entry successfully. Of course after some time, building up Gmax, etc.., knowledge, you improve, read upgrade your model. How can I update my mdl file into the user library ? Logical step could be to delete the old model first, and then reenter the object in the user libray, but how ? If I remove the files from the directory, at start up it tells me files are missing. If I add now the user library, it tells me the GUI is existing..... How can I get rid of this, now obsolete GUI ? 2. Scenery Distribution at Project Closure. Ok, my project is completed, and I want to share my scenery with my fellow FS community frinds. In my system FS Arno's tool has crated a GUI entry, which hold the mdl file, so on my system everything is OK. But the FS player who downline load the file how does he get the GUI (and model ?) It can't be in the BGL file because the BGL files, from Arno's tool, is only 1 KB ??? Opposed to when I go to the traditional process (ie BGLcompile from original XML, MDL files) it is 4 KB ? Thanks fo your replies.