Merge wdp waveform files when merging las files

[Basile]

Hello, 

I am merging .las files (LAS1.4 point format 9)  that are pointing to corresponding .wdp files containing waveform information. I'd like to merge these .las files but also their corresponding .wdp files. Is there a way to do so using Lastools? 

Thank you,
Basile