1. Find an example page somewhere on the web with an embedded flash and do View>Source in your browser to study the code used in the page. It might be an <embed>...</embed>. I've never included a Flash file, so I can't tell you the details.
2. Copy the code to your page and edit it in the html-view of nvu to point to your flash file.
http://forum.nvudev.org/viewtopic.php?t=5523&sid=d6030ec9f0ab7ef4d0b3e39b394585a3 might be helpful also.
Hope this helps.
I am new to web design .I need help to embed flash in my webpage.I am using Nvu