using accent marks in text

Operating System: Mac OS X 10.5 (Leopard)
Processor: intel

How do I add accent marks (acute, grave, cir***flex, diaresis, etc.) in
word 2008 for mac do***ents or in email (entourage) messages? (Also, how
do I find similar symbols)? I'm dying to spell my granddaughter Zoë's name
correctly, for instance (I just did it with spell check here, but where do
I find the character set and appropriate keystrokes)?.