bit of a hack to display Particle Speed...where the particles ARE that is...
Extract preset to:
C:\Users\xxx\AppData\Local\Autodesk\3dsMax\2017 - 64bit\ENU\en-US\plugcfg\DataChannelPresets
Then in your DCM (on a Mesher that is, coz DCM needs a mesh to work on, it can't work directly with PF), load it as a Preset.

ver 1.01: Maxscript op now will use correct (auto) frame rate