In the first few lines of your HTMLEditor_test_NewTest1.js file
// Custom configuration for iRite
FCKConfig.XMLFullName = 'NewTest';
FCKConfig.XMLFileName = 'NewTest.xml';
FCKConfig.SkinPath = 'skins/silver/'; // relative to fckeditor/editor/fckeditor.html
FCKConfig.DocType = '<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">';
I would expect to see '(custom)'; as the value for the third line, i.e. :
// Custom configuration for iRite
FCKConfig.XMLFullName = 'Advanced Manager Enabled (custom)';
FCKConfig.XMLFileName = '(custom)';
FCKConfig.SkinPath = 'skins/silver/'; // relative to fckeditor/editor/fckeditor.html
FCKConfig.DocType = '<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">';
Try using the 'Advanced Manager Enabled' preset in the HTMLEditor Quick Insert and then make any changes to the toolbars, adding your styles etc. from there.
Also (from a query in an earlier post) you can't use div (#mydiv) styles in the custom stylesheet, but you can duplicate the those rules in your stylesheet as classes (.myclass) and those will be available.