If you know any visual basic programming (VBA for example that ships with MSOffice products), you could interface with with the API that allows you to do this. There are several 3rd party programs which will allow you to hook to the midi instructions to play the notes you have in your files.

FMOD is one that I used very briefly in my previous employment: http://www.fmod.org/index.php/download

If you don't know VB programming, or any programming for that matter, then I'm afraid I don't have an answer for you.

-Scott