object floating away

OK i am trying to write an airplane script but know nothing about scripting at all. The object i have the script in is floating away when i am working with it is there a command i can use to have the wind stop moveing my prim?
Also would like to know the command to give it a max speed. I am useing a Basic airplane script 1.0.0 that was a freebie and the wiki isnt helping much. I am begining to understand the terms used, but the things i think are to control speed arnt working. I know this is a pretty vague question but i just need something new to try

Look in your script for physical and wind. Get the script to start with physical and wind false.
I'm assuming you need to work on the model with the script active.
When you need to test just hand edit the physical and wind to true.

Wind does not directly effect physical objects.

Just turn off physics on rez:

llSetStatus(STATUS_PHYSICS, FALSE);