[ubuntu-uk] setting up bt home hub in ubuntu

[ged]

Just a polite enquiry about the "WEP" key wrote on the back of these BT 
wireless routers.
Is it really wep ?
It is my understanding that wep is well and truly broken-about 53 
seconds to be precise, may be even quicker now.
I obtained the Bt 2091 off ebay for a friend and that had a little 
security code wrote on the back.
Is it not useless?
If so can it be changed at all?