Commands to convert .scp dump of 360KB 5.25" diskettes into .img files:

pfi 1.scp -r 600000 -p double-step -c 0-39 -p decode pri 1mfm.pri
pfi 1.scp -r 300000 -p double-step -c 40-41 -p decode pri 1fm.pri
pri 1mfm.pri -m 1fm.pri -p decode auto 1.psi
psi 1.psi 1.img

Note: .scp must have been dumped as IBM 1.44MB disk in the SCP program with: Density>Read>Low. See: http://www.cbmstuff.com/forum/showthread.php?tid=82&pid=2979#pid2979