Thanks guys

You can also use Channel Tools to do this. Just add it to the track and enable the delay you want for each channel.
 
Regards,
Dan

Thank you Dan, I'll give that a try, too.

If you play tracks 40ms apart back in mono, you'll encounter a slapback/flamming effect. This isn't always a problem, of course, but something to think about if there's a chance of mono playback (e.g., TV).
 
Also if the purpose of widening is to create a sense of space, I do that all the time with the Sonitus Delay for guitar amp sims. I feel much of what makes an amp sound like an amp is putting it in a room, so the Sonitus creates short "reflections."
 
I'll set the delays to two short prime numbers, like 23 and 29 for a bigger space or 17 and 19 for a smaller one. The reason for prime numbers is you can add a teeny bit of feedback and there won't be a resonance build-up in common with the two.
 
Then link the two Delay Mix controls for the left and right channels. At 0 you have no "room," at 100 you have super-wide stereo which sounds unrealistic to me. I usually set the amount of mix for around 30-40%. It gives a realistic sense of room space.
 
 

Thanks Craig!  I just tried your technique, and I like the results.  You're right, I listened to the cloned pair of tracks I had set up with 40mS difference, listened in mono, and could hear the flamming.  Your technique gets rid of that.