Moving to WordPress from another CMS

Have a site. http://nedha.org that’s on a fine CMS. But, the client wants to go free CMS and asked me to move the site to WordPress with this exact design they just paid to have updated. I’ve read numerous tutorials and have an idea how to do this. Right now I’m here. http://www.skwintz.com/cms/ But, how do I make it so the client can update her pages? How do I add dynamic content. WP is really good about explaining the blog, but what about the CMS? There are twenty-some pages in the site. Any recommendations how to move them over?

Input welcomed.
Thanks!