Resources need to be converted ?



I've translated the code of my application so that I can compile it under "Projet Builder". I look at some examples (like Simple Text sample) under macOS X, and I saw that resources are text file of a specific format (with .r extension).
I've my resources for Classic MacOS, made with ResEdit. Do I need to translate them ? How can I include old RedEdit file under Project Builder ?

Thank you for any help.
I believe this is MPW Rez format. There are command line tools Rez and DeRez under the /Developer hierarchy that may do this.