How to Enable Call Forwarding on the Blackberry Storm

My co-worker Mario at work wanted me to figure out how to turn on call forwarding on his phone. More specifically he wanted me to only forward rejected calls to a different number (one that is not in service). Enough about Mario...so far I found a short how-to at http://www.technipages.com/blackberry-storm-enable-call-forwarding.html. I hope that is what he needs.