How to move entire site with long URLs to WordPress?

Hi,

I want to move an old static site with .PHP pages into WordPress entirely.
The site has established and I don't want to use redirection. I want to preserve the old URLs.

Long URLs look something like this:
http://www.mysite.com/travelguides/thailand/bangkok-things-to-do.php

So, basically there are no more than 2-3 levels of folders and the pages are 2-3 levels down.

Can I move the site by preserving the URLs? Can this be done simply with 'permalinks' in WordPress by simply…

How to move entire site with long URLs to WordPress?