You add 16 bytes at the top using a hex editor, change the first four bytes to "NES" and 0x1A, and then open the file using Nestopia's or Nintendulator's NES Header Editor, select a NES 2.0 header, set mapper to 256, and the number of PRG banks to the ROM size in Kilobytes divided by 16.
Nintendulator-NRS runs TV Game 200-in-1, as does CaH4e3's current FCEUX build from his website.
@forgotusername: I can offer to extract all of the individual games, as I did before.