Ok, I might be interested joining in for fun ( actually started writing something this in mind ), but first few questions :
1) Is it absolutely necessary to write a score to go with the song. Because unlike most people here I'm not too fond of sheet music nor very adapt writing it. Translating what i do in to a paper will take forever for me. And I use a DAW that isn't a scorewriter. I deal most of the time with mididata and audio, not really with sheet music, except in rare occasions.
2) I noticed that many of the examples provided more examples of Big Band "versions" of pop songs, and some of them had a conventional drumkit, electric bass, ect. included. So the idea is to do the same thing without leaving the constraints of symphonic orchestra? Any effects allowed? Reverb, stereo widening and EQ excluded of coarse. ( Impossible to get anything near the sound stage of a symphonic orchestra without them. )