PowerCMS - Converting site to PHP from HTML

I have some websites that I created in Dreamweaver CS4 using both CSS and HTML templates. Every page was created using templates for consistency.

I want to use PowerCMS which does not appear to be working I believe due to not having PHP pages. Do I need to convert all my template created HTML pages to PHP? If so, what is the simplest way for me to do so and how would I convert my HTML templates?

Also, will I need to set up a testing server for this?

Thanks,

I also get this error everytime I open and close Dreamweaver:

The following JavaScript error(s) occurred:
Unable to open script file "C:\Program Files (x86)\Adobe\Adobe Dreamweaver CS4\Configuration\Shared\WebAssist\Momento\Library\WA_UserInterface_v2.js" (error 3).

This error has been happening for over a year. How can I fix this?

Thanks again...

to convert the site to php, you would need to rename each page using the .php file extension.

You will need to define a connection to a testing server in the DW Site definition, but that can set to use your remote server, it does not need to be a local testing server.

for the error, what extensions including version numbers are installed?

What is your DW Version? What is your OS?