What version are you running? From 7.4 onwards you can change the labels for these buttons. I've also seen people put text on the window just explaining what those buttons do.
Thanks for the reply Dave.
We are on version 7.3.2 and I've been told that any changes to button names (or removal of buttons altogether) is not supported.
The sooner we move to 7.4 or 7.5 the better I think !