Urgent! Firewire support in 4.6.2?

[Mathias Haas]

Hello! My wifes' company had a break-in during the night today and they 
stole ALL the computers. They have their backup on an external firewire 
disk.
At home I have a FreeBSD 4.6.2 setup - but I believe that 4.6.2 doesn't 
have firewire support, is this correct?
Is there any way to add firewire support to the kernel or do I have to 
upgrade to a later version of FreeBSD?
If so, what are the odds for a successfull upgrade from 4.6.2 to 4.10 ? 
A fresh reinstall would take a lot of time since the 4.6.2 server runs a 
ton of applications.