Acca @ 72BPM, Track in Reason @ 150BPM...

[B166ER]

This is a simple question, but I cant figure it out! I have an older track I was messin with in Reason at 150bpm, and an acca I wanna mash it with at 72 or so, how do I match em without extreme stretching? The vocal is already Live-ized, and I guess I could set warp markers, but it seems tedious. Is theere a faster way?