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What you are searching for is a so-called "packet writing" software. There are some like Nero InCD (I must confess that I don't know if it's free or not) or Sonic DLA, but I suggest to stay away from these softwares because they cause a lot of problems.
Many and many users complained about data loss and unrecoverable discs after using these softwares.
The most reliable way to do this thing is using RAM discs (not RW discs) with proper Panasonic drivers. However, you need also a burner able to write on RAM discs and RAM discs are also painly slow