How do I create a new frame using Flash CS5 on a Mac so I can add more pictures to my website?

Question

I have what I hope is a fairly straight forward question that I hope you can answer if you write code with a Mac or are at least familiar with the process on a Mac?  The person I have been working with to create my photography website uses a PC.  Here is the problem.  I am trying to use my Mac in order to create frames so that I can add 5 more images to a portfolio that presently has 15 images.  The code is in an index.fla file.  If I want to create a new frame in the index.fla, let's say LOAD CODE 381 and want to use the same text that is already present in LOAD CODE 380 but with a few edits, I have no trouble going to the Action-Movie Clip and finding LOAD CODE 380 in the left hand column.  The problem is, on a Mac, how do I create frame LOAD CODE 381 and then how do I copy and paste the text from LOAD CODE 380 into LOAD CODE 381?  It looks like on a PC one can open LOAD CODE 380 in the Action-Movie Clip, highlight the text then right click on the red rectangular box in the timeline.  By doing so (on a PC) one sees a drop down menu that gives the option to "copy key frame".  What is the equivalent of the "copy key frame" on a Mac?  I can see where on the Mac you can go to Edit >copy.  Is this the equivalent of "copy key frame" on a PC?  If so, once I "copy" the text how do I create the new LOAD CODE 381 so that I can paste the text into the new frame?
I WOULD BE EXTREMELY GRATEFUL TO ANYONE WITH THE ANSWER TO THIS QUESTION!  THANK YOU!!!!!

Answer 1

Sorry not to be more clear.  It is a name assigned to one of the 
frames by the person who originally designed the website and is shown 
in the list of about 150 action frames that were created in this 
particular fla document.  This "list" comes up in the left hand column 
of the Action-Frame box. When I click on Load Code 380 which is half 
way down the column of frames, the following text comes up on the 
large screen to the right of the column of 130 frames.
IMAGE.gotoAndPlay("start");
loadVariables("data/series01/15title.txt", "_root.IMAGE.TITLE");
loadVariables("data/series01/15price.txt", "_root.IMAGE.PRICE");
loadMovie("data/series01/about.swf", "_root.IMAGE.ABOUT");
IMAGE.mc_pic.attachMovie("pic","pic",1,)
IMAGE.mc_picTHUMB.attachMovie("pic","pic",1,)
This text is what I am trying to transfer to copy then paste into a 
new frame after which time I want to slightly edit the text.  I am not 
a programer so I apologize if I am not using all of the correct 
terminology.
Thank you again,  Jon