/bin/ksh -c \"cat $PMSourceFileDir/RT/TgtFiles/$OutputFileStrPerfHdr $PMSourceFileDir/RT/TgtFiles/$OutputFileStrPerfCSV | unix2dos -437 > $PMRootDir/RT/Temp/$Outp
Alternately, as a pure shell approach:
while IFS= read -r line; do printf '%s\r\n' "$line"; done out