First, read this about the old MM menus:
CSS Menu systems
CSS Express Drop-Down Menus (tutorial)
List-O-Rama (free DW Extension)
CSS Menu Maker (On-Line Menu Generator)
Pop-Menu Magic2 by PVII (DW extension purchase)
I have exactly the same problem. Does anyone have an answer to this? Can these old mm menus be edited in Dreamweaver CS5?