You can update Dreamweaver to include all the new and updated tag and function hints and Help for ColdFusion 8.

Update Dreamweaver tag completion and help to match ColdFusion 8

Install ColdFusion Extensions for Dreamweaver MX 2004

1. Make a backup copy of the configuration/taglibraries/content/codehints folder and its contents.
2. Download the cf8dreamweaverextensions.mxp from the Adobe website.
3. Double-click the cf8dreamweaverextensions.mxp file.