Most of the scripts (especially those present on ofpec.com) usually comes with a well written readme, a sample mission to demonstrate how they work and how they are used. Thos sample missions are usually free of objects or other scripts that doesn't belong to the provided script(s).
Also open the scripts themselves. Pretty often the author added a lot of comments inside the script, giving further informations about the use of it and explaining the use of certain variables to adapt the script to your very own personal needs.
And finally, if you got the scripts from ofpec.com, chances are good that theres a related thread in the forums where you can ask questions when you're stuck and the script author can give you direct help.
And finally, here's the answer of one of the most asked questions i always read through all possible Forums:
Where do i put the scripts?
As all scripts used in a mission are packed together with the mission, making it to one single .pbo file, all scripts and related files goes into the mission folder your currently working on.
The path on WinVista is:
Desktop\WINDOWSNAME\Documents\ArmA Other Profiles\YOURARMANAME\Missions\NAME OF YOUR MISSION
In this last folder goes all files. Remember that this last folder doesn't exist as long you didn't saved your mission in the arma editor at least once.
This should give you a good point to start with. For further questions, just come back here. There are a lot good people around here, always willing to help a beginner to make his first steps.
And i second what bedges said: 'flame' is not in our vocabulary.