Lo Pig Fondler,
Thanks for taking a look.
It is not possible to increase the horizontal drift velocity without the chute turning on its side and looking ridiculous, due to another strange quirk of OFP when using setVelocity on chutes. The chute is still affected by wind, which may make it seem unresponsive, but the flight path does deviate appropriately if you compare the smoke trail between the two cases. Maybe my demo should include a dummy who is launched a few seconds after the player to confirm this!