Replacing inconsistent audio drum track with MIDI drums

[elmojr]

I use Cubase 5 on a WinXP system.

I have recorded a song with a number of audio tracks, and no MIDI tracks. However, the drum tempo is not consistent, i.e., the drummer speeds up and slows down a little bit throughout the song. How can I add a perfectly quantized MIDI drum track, and then sync all the other audio parts to it? Am sure some minor adjustments will have to be made to the various audio parts, but am not clear how to do that.

The average tempo of the current real (audio) drummer can be ascertained in Beats Per Minute, and then the new drum track should be set to that tempo. However, since the audio parts have been recorded into Cubase using Cubase's default tempo of 120, the new MIDI tempo will probably make the audio files play faster or slower than they should.

All suggestions will be appreciated.