It tells you how to make it happy at the bottom of the report.

Analysis and Recommendations

• TOTAL_HTML - Congratulations, the total number of HTML files on this page (including the main HTML file) is 1 which most browsers can multithread. Minimizing HTTP requests is key for web site optimization.
• TOTAL_OBJECTS - Warning! The total number of objects on this page is 23 - consider reducing this to a more reasonable number. Combine, refine, and optimize your external objects. Replace graphic rollovers with CSS rollovers to speed display and minimize HTTP requests.
• TOTAL_IMAGES - Warning! The total number of images on this page is 15 , consider reducing this to a more reasonable number. Combine, refine, and optimize your graphics. Replace graphic rollovers with CSS rollovers to speed display and minimize HTTP requests.
• TOTAL_CSS - Caution. The total number of external CSS files on this page is 4 , consider reducing this to a more reasonable number. Combine, refine, and optimize your external CSS files. Ideally you should have one (or even embed CSS for high-traffic pages) on your pages.
• TOTAL_SIZE - Warning! The total size of this page is 141598 bytes, which will load in 32.82 seconds on a 56Kbps modem. Consider reducing total page size to less than 30K to achieve sub eight second response times on 56K connections. Pages over 100K exceed most attention thresholds at 56Kbps, even with feedback. Consider contacting us about our optimization services.
• TOTAL_SCRIPT - Caution. The total number of external script files on this page is 3 , consider reducing this to one or two. Combine, refine, and optimize your external script files. Ideally you should have one (or even embed scripts for high-traffic pages) on your pages.
• HTML_SIZE - Congratulations, the total size of this HTML file is 16951 bytes, which less than 20K. Assuming that you specify the HEIGHT and WIDTH of your images, this size allows your page to display content in well under 8 seconds, the average time users are willing to wait for a page to display without feedback.
• IMAGES_SIZE - Warning! The total size of your images is 59447 bytes, which is over 30K. Consider optimizing your images for size, combining them, and replacing graphic rollovers with CSS.
• SCRIPT_SIZE - Warning! The total size of external your scripts is 46866 bytes, which is over 8K. Consider optimizing your scripts for size, combining them, and using compression where appropriate for any scripts placed in the HEAD of your documents.
• CSS_SIZE - Warning! The total size of your external CSS is 18334 bytes, which is over 8K. Consider optimizing your CSS for size by eliminating whitespace, using shorthand notation, and combining multiple CSS files where appropriate.
• MULTIM_SIZE - Congratulations, the total size of all your external multimedia files is 0 bytes, which is less than 4K.

I wouldn't take everything it says as gospel. There's not a lot you can do about the CSS files, you could remove the white space from them though this will have a negligible if any effect on the site's speed. Besides, external CSS files are cached by your browser so they are only download once and won't affect the speed of any subsequent pages your visitors visit. To reduce the number of external scripts, remove the pop up image on mouse over script you installed. The best thing you can do to improve the site's speed is to reduce the number of images and optimise the file sizes of the ones you do use. Use separate images for thumbnails and product descriptions for the best results.

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Lawrence