How to convert to cdr format?

@Judy O'Callaghan. Very TRUE indeed! I've been in them all, pure headache. I had to output my PDF to film for 4-color separation where the print service had (knows) only corelX4. The resault was ...  

... require a program for converting PDF documents into the CDR format. Nevertheless, the process ... is that you convert them into the bitmap format with their respective ...