Hi Shannon,
Not knowing everything about your system, it might be less troublesome
to suggest that instead of removing Entourage from your computer that
you just ignore it.
Drag the Entourage icon from the dock and let go, then poof! It's out of
sight & out of mind.
Open Apple Mail and go to the preferences and choose the email program
you would like to be used as the default mail program on your computer.
This way you don't have to worry about any esoteric consequences from
removing the Entourage application from your drive.
-Jim Gordon
MacMVP