Joomla Optimistaion

My site is built with Joomla 1.5.8 and runs with the Evolution Yootheme template.? I have already optimised the site with a number of techniques but wish to further reduce load times. The successful bidder will be able to show their expertise in this area. You will analyse the site, propose improvements and demonstrate the load time savings, then implement the changes. I have already done a number of improvements including the following: Joomla system cache Module caching Gzip compression Expires Headers Reduced javascripts to 4 Optimised images Removed unused modules and components The site can be reviewed here on my demo server: [[login to view URL]][1] Some possibilities: Create css sprites for background images. This will require modification of the template to accomodate this technique. Assess the template and remove unused elements. Fully optimise the template for this site Reduce the number of http requests Reduce the number of images required Combining javascripts whilst retaining full functionaliity Further javascript size reduction You will be required to suggest additional enhancements to get this site loading as fast as possible