I wrote a script for my own needs that made up a MK curve from the PK values in a .quad file. In my case, I wanted the MK to act as a "boost" for the PK at the denser end of the range (dense negative, that is), so I made it ramp from 0% of the PK at 0, linearly to 20% of the PK at 256 (the dense end of the curve).
If you can read Unix Shell and awk, you? are free to use the following. (You'd paste the following into a file, let's call it PKTOMK.sh, mark it executable via chmod +x PKTOMK.sh, and then run it on your favorite quad file via PKTOMK.sh myfavorite.quad? where it will produce myfavorite.quad.edit.? You then have to rename the resulting file and install it in the usual way.)
#!/bin/sh
if test $# -lt 1; then ?echo Usage: $0 inputfile [pk multiplier]; exit 1; fi
MULT=${2-"0.2"}
sed '/MK Curve/,$d' $1 > $1.edit
awk 'BEGIN { process=0; mult='$MULT'; i=0}
/# K Curve/ { process=1; print "# MK Curve"; next}
/# C Curve/ {exit 0}
/^[0-9]/ {if (process == 1) {$1=$1*(mult*i)/255.0; i=i+1; print;}}' $1 >> $1.edit
