Pacha is able to run on the background with the --daemon-start flag. However, you may want to do this automatically in your environment.
Here is an example INIT script that you could use (modify to fit your needs):
#! /bin/sh
### BEGIN INIT INFO
# Provides: pacha
# Required-Start:
# Required-Stop:
# Default-Start: 2 3 4 5
# Default-Stop: 0 1
# Short-Description: Start the pacha daemon.
### END INIT INFO
#
# Copyright (c) 2010 Alfredo Deza, alfredodeza [at] gmail [dot] com
# Licence: MIT
PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
DAEMON=/opt/pacha/lib/daemon/pachad
NAME=pacha
DESC="Pacha daemon"
LOGDIR=/var/log/pacha.log
test -f $DAEMON || exit 0
case "$1" in
start)
$DAEMON --start
;;
stop)
$DAEMON --stop
;;
restart|force-reload)
$DAEMON --stop && $DAEMON --start
;;
*)
N=/etc/init.d/$NAME
echo "Usage: $N {start|stop}" >&2
exit 1
;;
esac
exit 0