Here's a piece I wrote for my wife a couple of years ago called: At Home With My Love
I put the chords in BiaB (Band in a Box) then created a midi file.
I exported the Midi file to Sonar X1. My brother has been trying to teach me the intricacies of using a DAW to create realistic sounding recordings. All the instruments are Garritan except for the drum which is the Session Drummer plugin for Sonar X1.
The hard part was getting the balance, EQ the mix for each instrument, adding a little reverb and creating space for the instruments to 'live-in' as my brother calls it.
I'm beginning to understand the intricacies of doing this in a DAW now, but it is a steep learning curve.