Option between Background Image OR Custom Code (like Advert Tags)

Hello,

I have an earlier request that has to do with the background image.

Current we have the option to set GLOBLA bakcground image and I think a link
OR
You can set background image per category.

Is it possible for you to add the option to select

1. Background IMAGE & URL Global and ability to set background image & URL per category
2. Use custom code (like advert tags) and ability to set this GLOBAL and also per category

I am willing to pay for this additional option and you can make this available to all in an update as the current background image displays perfect, it displays the theme boxed as well and our advert tags does exactly the same when there is adverts set to display. Also if we can set it to collapse if no adverts displayed so not display boxed that would be awesome.

For this to work I would imagine a select option ENABLE CUSTOM CODE AS BACKGROUND and then a CUSTOM CODE field both of these per category and in global option.

Thank you in advance!

thank you, I will contract the work out as I need to keep it tidy and clean and my coding skills are a bit rough.