Opencart background image manager

Hi, I need an Opencart script that in admin you can select a date and select a background image and on that date that background is displayed, for instance on and around Christmas the website background is christmasy... It must have/be: - No Opencart files overwritten - VQmod - Compatible with as many Opencart versions as possible - In the admin be able to select start and end date - Outside of any special dates, the default background is displayed - Backgrounds to be selectable if repeatable or not and select the under lying color. - Option to change the shops logo on the special days also A very simple job, I just dont have the time to do.... Any questions, please ask! Thanks, B.