PHP Nuke - error with Firefox

I'm trying to integrate this terrific editor into Nuke & phpBB & I'm receiving a few errors with Firefox.

Is anyone receiving a similar error in the logs:

Firefox:
"File does not exist: FCKeditor/editor/dialog/skins/office2003/fck_dialog.css"
"File does not exist: nuke/skins/office2003/fck_contextmenu.css"

IE: No such error

1) when right clicking Firefox doesn't work right .. the background is blank ...

I've narrowed it down to the way Firefox/IE handle relative paths ... but haven't been able to find it in the js files ...
It doesn't seem to matter what skin I'm using...

I've edited the fckeditorcode_xxxx_1.js files without any luck.

you can test it at: http://nuke.entertainmentcenterpc.com/forum-8.html