Most video cards have 2 DVI ports anyway.
Just use you TV that you hooking up as a monitor, so take the cord out of the monitor and plug it in the TV. It has to have a DVI port though, so make sure the TV will support the Cable.
My TV was bought in 1999 and I know it has an S video. Could I use that? Use as a monitor, a 52" monitor, cool. Do any video cards come with and S video port?