SWBKCB
Don't know the specifics of your flight in question but if it is to be operated by the A330-300 then this aircraft does not have the seat back screens that all of our other 330's have. It does have IFE but uses the cabin screens to show one film at a time.
By the way, the 330-300 isn't from another operator, it is from our scandinavian arm. It is fully badged as TCX and operated by full TCX crew.
My advice to your friends; forget the IFE, take an ipod and enjoy the onboard bar (sensibly of course)
I never bother with IFE on any airline, it's almost always a complete disappointment.