How to make uTorrent run with different user than root

#!/bin/bash
### BEGIN INIT INFO
# Provides:          utserver
# Required-Start:    
# Required-Stop:     
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# X-Interactive:     true
# Short-Description: Start/stop utserver
### END INIT INFO
set -e


############### BEGIN EDIT ME ################
RUN_AS=headphones
RUN_GRP=users
NAME=utorrent
DESC=utorrent
############### END EDIT ME ##################


function install_autocomplete () {
echo '#!/bin/bash
_utstart()
{
    local cur prev opts
    COMPREPLY=()
    cur="${COMP_WORDS[COMP_CWORD]}"
    prev="${COMP_WORDS[COMP_CWORD-1]}"
    opts="start stop install uninstall"


    if [[ ${cur} == * && ${COMP_CWORD} -eq 1 ]] ; then
        COMPREPLY=( $(compgen -W "${opts}" -- ${cur}) )
        return 0
    fi
}
complete -F _utstart -o filenames utstart' > /etc/bash_completion.d/utstart
source /etc/bash_completion.d/utstart
chmod +x /etc/bash_completion.d/utstart
echo "Autocomplete entries for utstart added to bash. You may need to reboot or manually source the entry like this for this session:
      . /etc/bash_completion.d/utstart 
"
}


DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
me=`basename $0`
UTORRENT_LOCATION="/opt/utorrent"
case "$1" in
  start)
        echo Starting utorrent server
        cd $UTORRENT_LOCATION
        ./utserver &
        ;;
  stop)       
        echo Stopping utorrent server
        killall utserver
        ;;
  setup)
install)
        echo Install


        echo Scriptname: $me
        echo Path: $DIR
        echo Installing utorrent server as a boot-time program..
        cp $DIR/$me /etc/init.d/
        insserv $me -dv
        echo utorrent server installed to boot-time..
        install_autocomplete
        exit 0
        ;;
  uninstall)
  echo Uninstall
        echo Uninstalling utorrent server from boot init..
        insserv $me -rv
        echo Not deleting /etc/init.d/$me. You may delete it yourself. Leaving it there wont do any harm.
        echo utorrent server removed from boot init.
        ;;
  *)
        echo Usage: start  stop  install  uninstall
        exit 1
        ;;
  esac
exit 0