Sync MIDI to AUDIO track -- both created separately

I know I've done this before a few times, but I'm having a brain-sprain today and can't figure out the straightforward way of doing this...
 
The scenario
- I have an audio version of a song. 
- I also have a MIDI version of the same song.
- These were created on separate occasions, so they will not align as-is
- So far neither has any tempo map in Sonar.
 
The goal
- create a tempo map to the Audio file (easy-peasy for me)
- align the MIDI file to that tempo (which is where I am stuck).
 
How do I set MBT for the MIDI file without affecting the tempo map I generate from the audio track?  I've done this before a few times but it's been a while (Sonar 8 and prior). 
 
 
My current solution
This is the approach I am contemplating right now...maybe this is the only way?
- create a project file for the MIDI track
  - generate a tempo map for that MIDI track
  - clear out all the tempo changes so that the MIDI track adjusts accordingly
- import the audio file into the above MIDI project
  - create a new tempo map as per the audio
  - the MIDI track should automagically adjust to this new tempo map
- both MIDI and AUDIO are now in sync, with a perfectly matching tempo
- No audio should be harmed in this process ;-)
 
Is this the only way to do this?  Hmmm, maybe it is.  Now that I'm thinking about it, I seem to recall doing something similar before.  Anyway, I'll post it here in case anyone needs to do the same or has a better suggestion....
 
 

just a guess... click select the audio clip. press a for audio snap. turn on as, then click the extract groove button.  highlight the midi track and right click then select quantize to pool??

Is the audio tempo steady (e.g., done to a click track) or was it just people playing to a drummer?
 
I assume the tempo and total track time is almost the same or this would be hopeless.