This assumes you are starting Fusion as a non-root user, and you already know how to run the the start, stop, restart and status commands are really simple *.sh files in the /opt/fusion/bin directory. Here are the steps that worked for me

Create init script

sudo nano /etc/init.d/fusion

Add commands to script

#!/bin/bash 
# description: Fusion Startup 
# processname: fusion 
# chkconfig: 234 20 80 
# by max.derungs@providence.org 

FUSION_CMD=/opt/fusion/bin/fusion 

# Source the function library for daemon. 

. /etc/init.d/functions 

# daemons 

case "$1" in 
start) 
daemon --check fusion $FUSION_CMD start 
;; 
stop) 
daemon --check fusion $FUSION_CMD stop 
;; 
status) 
daemon --check fusion $FUSION_CMD status 
;; 
restart) daemon --check fusion $FUSION_CMD restart 
;; 
*) 
echo $"Usage: $0 {start|stop|restart|status}" 
esac
exit 0

Set permissions of and make executable

sudo chmod 755 /etc/init.d/fusion

Setup chkconfig utility to start service at boot time

sudo /sbin/chkconfig --add fusion sudo /sbin/chkconfig --level 234 fusion on sudo /sbin/chkconfig --list fusion

Test

sudo service fusion start