What worked for me was to select in Dreamweaver all the content (per edit area) I wanted to pre-populate the power CMS with, and in Dreamweaver 'code view' copy it all. Then, in PowerCMS Admin - (either insert or update) content, click the 'source' button to get source view, and just paste it in.
(This is a page I tested it on; - three areas, main contnt area, and two areas in the sidebar. All of it was pasted in from the source code of my document in to the source view of the three areas in my CMS).
Don't forget to remove the content from the actual HTML of the page - or it will appear twice!