Add banner positions in Joomla template

NOTE! This task is only suitable for xhtml/css experts with knowledge about the Joomla template system. We are creating a Joomla site based on Joomlart's Xenia template. You can see the unmodified template at [login to view URL] - select "JA Xenia" at the bottom. We are using the template in "narrow mode", which is 800 px wide, we have aligned the layout to the left and are only using the horizontal menu in the header. The task for you is to add banner positions that can be managed in Joomla (ArtBannersPlus is currently installed). One position is directly below the horizontal menu, the banner here will vary between 728 and 792 px width depending on current advertiser, height will be 90 px. The remaining space around the banner should match the rest of the site, white should be fine. Three vertical 250 wide positions to the right of the main content, so the total width will be 800 + 250 + some small divider space, i.e. users with resolution 800 will only see the main content, unless they scroll horizationally. These positions may vary in height, but will typically be 240 px. It should also be possible to add more vertical positions if needed. When the banner positions has been added, the site layout must still look good in IE 6 & 7 and FF 1.5 & 2.0. An expert should be able to perform this task in notime, please don't place any bids higher than $30, thanks.