How can I target a specific lightbox (Colorbox)

Question

Greetings,

I need two lightboxes on the same page. I am using Colorbox. One of the lightboxes has an additional button.

I have been able to create this button OK dynamically by editing jquery.colorbox. But now i am unsure how to remove this button from the lightbox that doesnt require it.

All I need is a hook in the form of an ID on one of the outer DIVs such as 'cboxContent' and I can simply use CSS to hide the button.

But how can I add this hook??

Cheers