I have created a couple modules where I want to programmatically add HTML to the footer textbox, which is located in settings > advanced settings > footer. How can I do that?

Thanks

Some ideas ...

You might want to take a look at the code for the skin objects related to login and registration to see how those are done. You could create a skin object into which you inject HTML.

But, you might want to give more details as to how much HTML you want to use. It might be better to use a module to do this.

And, you can put a div tag there, give it a name, and use javascript to inject HTML.