I have tried to change the buttons to open an external program, but I can not get it to work, I have gone into settings, highlighted notebook, hit setup, put "OziExplorer" for Application Name, C:\OziExplorer\OziExp.exe in Application Location that is what it said in Properties for OziExplorer. Or should I have put location C:\Documents and Settings\All Users\Start Menu\Programs (tried both still does not work). do not know what Application parameters are or window name. At present I have to exit out of Centrafuse to start up OziExplorer, but then have no music or use of Centrafuse. All I want to be able to do is have a button which will open program, start navigating when offroad but still be able to use centrafuse for music etc. Would be great if I could just minimize centrafuse. Am not good with computers so any help would have to be given as if writing "computers for Dummies"