These sounds are meant to be used with the Betty Bob patch developed by impactt.
I developed the Switcher™ program because I am sick of having modified files with no way of reverting them without re-installing from original disks.
Double click on the Switcher™, open your sound file in the dialog, and then select the Install option. Tell the program where to store the original sounds, and then you're in business.
You will probably hear a error sound and the messages window will have a 'Load resource failed' message. This is because I included an extra sound for the betty's to say which isn't in the original file.
When you're sick of the betty's just use the Switcher™ to deinstall the betty sounds and return the file to it's original state.