before opening Theme-It, complete the following steps:
1) Define a new site in dreamweaver.
2) in the Presentation site zip file, open the output_html folder. Copy the entire contents of this folder to the Root of the Dreamweaver site.
3) in the Dreamweaver site, open the Tempaltes/siteassistpro_template.dwt file.
Now go to Insert -> WebAssist -> Theme-it