Mac OSX;
-DW8
--Hard disk: Users: <Your User Name>: Library: Application Support: Macromedia: Dreamweaver 8:Configuration
-DWCS3
--Hard disk: Users: <Your User Name>: Library: Application Support: Adobe: Dreamweaver 9: Configuration
-DWCS4
--Hard disk: Users: <Your User Name>: Library: Application Support: Adobe: Dreamweaver CS4: en_US: Configuration
(Please note that <Your User Name> Should be replaced with the User name you use to log into your computer)