If you purchased the download version of a qualifying Creative Suite 3 edition
(one that includes DW CS3) and you're having trouble finding the GL2DW
extension, please contact Adobe tech support and we will get it to you:

http://www.adobe.com/support/contact/

Note that at this time, the GL2DW extension is only available to customers
that have purchased a qualifying CS3 edition or the DW CS3 standalone version.
The CS3 trial versions will be coming out in 6-8 weeks.

David Alcala
Adobe Product Support