Recording sky



OK a newbie here. the father in law has just bought a new TV (Panasonic TH-50PHW3) and also has a Panasonic DVD recorder (DMR-EZ45VEBS)

he rang me up asking how does he watch one channel while recording another, so i have shown him how to record the channels bbc1/2, itv1, ch4 and ch5 while he watches sky, however i cant fathom out how to record sky and then watch one of the said five channels, it must be possible. when i record sky it wont let me put any other channel on.

i am back at home now but just thought i wonder if i would be able to do it using the free view that is with the TV, IE record sky and watch the said channels through free view.