You can get around it, but it would be awkward and time consuming.
first of all buy an analogue TV tuner for your P.C, and record anaolgue TV onto your P.C.
convert the recording on your P.C to a .rec format that the toppy will play.
transfer the file to the toppy, and it will ( should) play.
there are probably easier solutions, that dont involve a topfeild, but as far as im aware topfeild only make recievers/recorders for digital TV ( satelite and terestial)