Your first quote, falls under the rule: "If you want someone to do something for you, don't start the question by telling him, that he makes ugly children, followed by a kick to the groin!"
Your second and third quote, show two kids wanting to show, who's boss, by kicking the other ones behind.
This kind of behavior will never get any of the parties involved, what they want.
2aCD is obviously interested in you integrating his script into your project and you would like to have his IE script to work with your project.
The first thing you'll have to do is, show appreciation for the effort 2aCD is showing. Even or better especialy, if he fails to meet your expectations.
As a general rule: "In an interaction, the one person, who is doing little or less work, has to show appreciation for the other, being willing to do the majority of work."
So show first appreciation for his effort, before moving on, in a nice manner, to ask him to fix a few more things. Don't ever get angry or demand it. That only pisses people off and gets you nowhere.