AllWebMenus Pro provides support with Dreamweaver software. You can find the free available Dreamweaver extension and the appropriate information about how to install it and integrate your Deamweaver software with your AllWebMenus Pro application in the following link of Likno site: http://www.likno.com/wat_dreamweaver.html
Let's assume that this extension is already installed (as described in the link I provided above) in version CS3 of Dreamweaver. What does one have to do in order to install it also in version CS4 of Dreamweaver?
For each Dreamweaver version, you have to use the appropriate extension manager; for Dreamweaver CS4 you need to use Extension Manager CS4, while for Dreamweaver CS3 you need to use Extension Manager CS3.
Since each version recognizes their own CS products, Dreamweaver CS4 should be available only in Extension Manager CS4. Use the built-in install function in the Extension Manager CS4 and open the mxp file (this file exists in the free extension) to install it for Dreamweaver CS4. This will not affect the current CS3 integration.