Is it possible to overlay two logs in datazap?

Reason I ask is I think we can make much better usage of the logging available in MHD and datazap, when you make a modification / MAP change to your car and you accelerate on the same stretch of track, performing logging, which records speed and time, you can quickly see the 0-60 0-100mph etc. If we could overlay two logs (say the speed side by side (or even revs) we could quickly see if one particular tune contributes to greater acceleration than another.
The starting point in both logs would need to be identical, so it could be done by starting a log say from WOT at 2K RPM in 1st gear and aligning both logs to this.