CMS redesign & CSS fixup

Need to fix a few areas of our sites using CSS and code so that everything shows in the right position. 1. Coding to html and css from an agreed mockup 2. Uploading new style css file and some images 3. Backup the files before editing 4. Editing some files [login to view URL] and [login to view URL] to suit the css layout. 5. validating and checking at IE7, FF3 (cross browser compatibility)