Extended Grid

Hi
I am creating an extended grid which has a certain number of fixed columns .The number of columns to be fixed are dynamic .. I need to outline the column of the right border of the last fixed column .. so that the user can make out that the columns beyond that are not fixed ..
help alex !! .. also i need to set an image in two halves .. thgh NOT cell by cell ... (#myGrid .aw-gpanel-left {
background: url(image1.gif);
}

#myGrid .aw-gpanel-center {
background: url(image2.gif);
} )


I need the image to be displayed over the entire grid ..

hi ..please assist

Does this one work ? -

#myGrid .aw-gpanel-left {
background: url(image1.gif);
}

#myGrid .aw-gpanel-center {
background: url(image2.gif);
}

yes it does work .. but the images are cell by cell ..
how do i get the image to be for the entire background .... one each for a different half ..
Alex ..could you please put up a section for css documentation .. it would be very helpful....