Question on CF errors

Is there a way ( in coding or serverside) to "hide" messages like

"
the web site you are accessing has experienced an unexpected error.
Please contact the website administrator.

The following information is meant for the website developer for debugging purposes.
Error Occurred While Processing Request
"
We have several costumers who see this and freak out, and I am trying to find a setting or a way to show a
" the website made a booboo sorry" type pages instead of the normal blue/grey/purple page.

Thanks