Hello,
I took a look at your site and it shouldn't be any big deal to re-create it into a Kentico CMS. Please follow the instructions mentioned in our Developer's Guide:
Installation and deployment.
There are step by step instructions which will lead you through the installation of Kentico CMS and setup your site.
Then, you can start to develop your site as described here:
Portal engine overviewHope this sheds some light and points you to the right track.
Best regards
Ondrej Vasil