I'm not positive about these drivers in specific but, any driver I've ever used can be safely wired in parallel. If your talking about making a magenta (pink) laser and you are trying to power two drivers for seperate diodes off of one battery, then simply wire the input of the drivers in parallel (pos. of batt to pos. of each driver, and neg. of batt to neg. of both drivers).
You can double the max regulated amps out at a given voltage by using two drivers wiring the inputs in parallel (same battery or seperate) and the outputs in parallel as well.
By wiring the inputs of two drivers to seperate batteries and the outputs in series you effectively double the voltage with the max amps out equal to the max of one of the drivers alone.