I also have Dreamweaver, and yes there is a menu import option to retain formatting from MS Word. However, I heard some Dreamweaver HTML tags are not recognized by eBook readers. Should be OK for just text blocks though.
Unfortunately, in my DW installation the "import from Word" option is greyed out. Will need to check out why. Maybe because Word is not installed on this computer(?)
However ... I just tried a cut-and-paste as you suggested, but with an RTF. Looks good. Maybe it would be better for this purpose to simply re-save the Word document as RTF anyway(?)