It is string 1410 that controls that but it can’t not be changed to launch another app. I have tried but it launches winnt32.exe even after editing the string. My custom setup.exe has the following strings 1214, "Install Software from DVD" and 1414, "$OEM$\\$1\\Install\\wpi\\wpi.cmd" This lauches WPI from DVD with a simple click Maybe you can edit those strings to your needs