Note this involves editting a game file, so make a back-up before proceeding.

Look for the progress.dat file in the ...dreamcatcheremergency fire
responsesave directory. Use a text editor to open and edit that file and change
the number on the "Progress" entry to "9", and the number on the line "Star"
to "5", which will give you 5 medals for each scenario. Then type Star 2 to 9 under each line, exactly as the first 2 were written, adding
the number 5 at the end of each line. Save the file (as a *.DAT file) and you're
done.