Hi. I found very useful your clarification about GMA file. I tried both the patched version of MapSource and BaseCamp but I noted that MapSource run fine avoiding the map authentication control. The patched BaseCamp, instead, doesn't work at all! I think the reason is that tha version of patched BaseCamp.exe is 3.05 while the original I had on my PC is version 3.06. So maybe the .DLL' version (3.06) is in conflict with the patched Basecamp version 3.05. I would find a patched BaseCamp version 3.06. Do you have it?