Mozilla composer

I have been using Mozilla composer to work on websites.  I am actually trying to update existing websites.  One of the sites uses frames.  The one frame on the side that contains the menu does not scroll.  So, depending on the resolution of the user's machine, he/she will not be able to view or select the bottom few menu links.  I don't like this, and would like to change it.  I believe all I have to do is change the code to set the scrolling option to auto (the same setting as the frame that does scroll).  The problem is that when I try to paste the frame code into the html part of the composer, the composer doesn't seem to understand, and just deletes the code after I try to preview what has been entered.  It is an ASP frame page, is there any way that I can change the frames settings with composer, or notepad.