Hello - I would love to do this project for you. I am a Band and Choir teacher, and I'm doing this Freelance thing on the side. I use this technique you're talking about regularly - I have lost count of how many songs I have inputted into MIDI format. What you're asking is very simple and I could probably have it done within a half hour.
I'll use Finale 2012 to input the music. What program you then use it with doesn't really matter; a MIDI file is a MIDI file and can be used in many different programs. The nice thing about Finale is that I can input all dynamics, articulations, tempo changes, and so forth and really give you a quality file. There are two really professional-level programs for doing this: Finale and Sibelius. I like Finale, but it's just a matter of taste.
Anyway, I'll get it done super-fast and well. I hope to hear from you soon!
Have a great day,
Tim McFarland