How to update Backup Exec Appliance with no internet connection?

HI,

As it is in the title: I have a Backup Exec 3600 R2 Appliance which is not connected to the internet - and unfortunatelly it has to stay that way, I've downloaded installation package of SP2 and now in what way should I install it? I've searched the BE options for somenthig like "offline updates" but I found nothing ;)

Please help :)