My questions are:

1. should I record direct from one of the arrangers to a USB drive and then play as a wav file or should I change the wav to an mp3 file (I have the means to do that).

I usually simply playback my tweaked SMF files thru my keyboard directly into my Mixcraft program on my PC afterwards EQ, etc, then EQ or add FX, etc, & save to Mp3 or Wav. for playback


2. Should I use a different recorder, ala Sonar LE or some other similar program? What additional equipment would I need? Which software program would you recommend?

http://www.acoustica.com/mixcraft/

there are alot of support and many YouTube instructional videos also..


3. What if I wanted to add some vocals or instruments? Can I do that separately after the instrumental audio is recorded? What would you suggest in that case?


Cass Mixcraft 6 is all you'll need, so easy to use. ....this is a great program for recording at a good price also. Once you record the music in stereo on two tracks in Mixcraft 6.....then you can go back and record as many "Additional" tracks, vocal or instrumental, as you wish to your project and when done save to Mp3 or Wav. Then you can playback with your laptop, Kb, etc,