I did modify the original stylesheet. I made the overall page width larger by 90px and tried to adjust the widecolumn and narrowcolumn parameters to reflect this change. Here is what I have done:
.narrowcolumn {
float: left;
padding: 0px 55px 20px 45px;
margin: 0px 0 0;
width: 514px;
}
.widecolumn {
padding: 10px 0px 20px 0px;
margin: 5px 0 0 0px;
width: 336px;
}
I must say, nothing seems to bring that sidebar over to the right in Firefox.