IE5.5 FCK toolbar bug fixes

I'm using RC2 and experiencing bugs related to the initialization of the FCK toolbar in IE5.5. I've found the bug reports related to this that were fixed in successive releases. Since I'm still using a deployment of FCKeditor-RC2 I need to apply these fixes to my code base (due to numerous source customizations I've made). I know it's a long shot, but does anyone know what source changes these bug fixes involved?

The fixes I'm after are for the following closed bugs.

1116987 RC2 Does not work in IE5.5 >> fckeditor.php & Javascript
1100759 RC2 IE5.5 JS Error

possible also,
1037758 Ie 5.5
921389 JS error on IE 5.5 w2k

Thanks for any help,

HM