Creating themes in Concrete5 is much simpler, but converting is always a little bumpy. And it depends on how the Wordpress theme was implemented. Were you using Wordpress as mainly a blog, or as a CMS (Sub-pages, etc...)

Is it a theme you created yourself, or a publicly available one? If so, I can take a look at it and help you get it rolling.

- Josh

It's going to require some html and css (and a little bit of php) coding -- otherwise there's no way to do it.

If you are okay with that, then what you really want to do is first convert the wordpress theme back into a plain old html/css template, then from there convert the html/css template to a wordpress theme. If this is a free wordpress theme it's likely that a regular html template of the theme already exists (google for the theme's name along with "html template"). Otherwise it might be easier to go to the demo page for this theme (or your blog if you already have it up and running), do a "view source" on the page and use that html as the basis of your new c5 theme (you will also want to make sure you grab any related css and image files).

If you're looking to convert it yourself I'd start with the how-tos and general docshttp://www.concrete5.org/documentation/general-topics/...

Hope it helps