Does anyone know of a program that can record streaming movies?

I have my house setup so I can watch the TV on my computer (over the network), but most programs only let you watch it, not record. The tv card came with some software to be able to record, but I would rather record on my computer.

I know there is such a thing, just don't where I could find it .

I was a bit vague on the setup so Ill draw a little pictogram.

Computer with TV card installed (streaming enabled) -> LAN -> My computer in the other room (using a player such as Windows Media Player).