I wrote quite a few DOS programs in the late 80's/early 90's that used ini files appended to the .exe as the configuration. All you had to do was run `copy pro

I wrote quite a few DOS programs in the late 80's/early 90's that used ini files appended to the .exe as the configuration. All you had to do was run `copy prog.exe + config.ini program.exe` to build a single file that could be passed around without worrying about either a lost or changeable config file. Your code just needed to read its own exe header to figure out where to offset into it to pull out the ini contents after opening the file in read-only mode. It worked very well for apps where you didn't want users to mess with the config.