OK, finally, here is the parachute landing control script. I went ahead and made a demo mission. There is no readme, but the headers/footers in the scripts and functions are very detailed.
I hope it works for you. One thing that I found when I was doing more careful testing of the demo, is that parachutes do not like being "setvelocitied" against the wind. They will move fine with the wind, even transverse to the wind and even as much as a 45 degree angle toward the wind, but as soon as you try to force them to go more directly against the wind than 45 degrees they become very slow moving. I guess that this is OK, as even in real life, a "glide" chute does not go very well against the wind.