You don't need the BRF file... it's defunct and not used by anything
The frequencies in the file you showed in your post does not have any CD, Ground or Tower frequencies at all... and these are the facilities taken from your FSX installation by MakeRwys
EGFF,0,0,"Cardiff"
EGFF,1,132.47,"EGFF"
EGFF,5,128.32,"CARDIFF"
EGFF,6,125.00,"CARDIFF"
EGFF,7,122.80,"CARDIFF"
EGFF,8,125.85,"CARDIFF"
EGFF,8,126.62,"CARDIFF"
Missing....
CD would be EGFF,2,
Ground would be EGFF,3,
Tower would be EGFF,4,
You could add these manually but you would have to do so each time you run MakeRwys