1) Can I change the splashscreen of iTools? The splashscreen for iTools is a 3-channel 482 x 294 PNG image stored as file 'itools_splash.png' in IDL's open source '.../resource/bitmaps/' subdirectory. At the very least you could effortlessly save your own 482 x 294 RGB image as a PNG image in this filepath and iTools on your own installation would start using your image instead of RSI's default. With a little more effort, you could recode files like 'idlitwdsplash.pro' in IDL's open source 'lib' directory tree to work with images of your own size, format and filename, if you wanted to go to some extra effort. 2) Can I copy any file of "framework" directory and modify it (the copy)? You can modify the copy, create an IDL search path that puts your personal IDL code directory before IDL's 'lib' subdirectory, and put the modified file in that personal IDL code directory. This way it would be found and executed before the original version that you modified. And you wouldn't even need write privileges in the directories where IDL is installed to accomplish this method of modification. Saludos, James Jones