How to remove the "reset" button function while playing with some emulator?

[tiagoleal1987]

When my nephew is playing on my V90 and accidentally hits the "reset" button, the emulator displays the menu with various options. I've tried in every way to change this command by editing the emulators .elf files (very difficult via hexadecimal), but I couldn't. In the case of GMenu2x there is a settings file in SD card where I can easily remap or disable some buttons, but in emulators there isn't. I've been trying to sort this out for weeks, but I think I need professional help. In short, I don't want my nephew when playing Super Mario World to run the risk of hitting a button and going to the emulator menu with a lot of texts and options. Disabling this, I know I can still shut down the console correctly by pressing "reset" + "select" and it is amazing. But is there any command that, instead of turning off the console, just exit the emulator and go back to GMenu2x without need to shut down? Please someone help me! I know I ask a lot of things, but it is so important to me!