I'm looking into converting a client's site to Concrete 5 CMS. The site is huge with over 20 subdirectories and such. I'd like to keep the url's for the transferred pages in the CMS the same as the existing. The exising is simple.

index.html
subdirectory/index.html
subdirectory/info.html
subdirectory/test/anotherpage.html

I cannot figure out how to do this with Concrete5.

I know I could just do straight up URL Rewriting, but i'd prefer not to.

Any suggestions?