need help: how to sync project tempo to audio clip in Sonar 7

hi folks.  i'm using sonar 7 producer edition. i have a 5 minute wav file created from a drum loop.  i would like to sync the tempo of a mixdown to the tempo of this loop/track.  the tempos are close but not exactly equal.  how do i do this?  i have checked out various threads & tutorials, but most talk about counting beats & measures or refer to MIDI, which i don't use.  surely there's a way of snapping the transients of the project to the transients of the loop track?