If that search box is a widget (Appearance > Widgets), then yes. You would replace the search widget with a text widget, where you would add the HTML code for a banner.
But do check with the author, as this is a general purpose forum
You can ask for support in the item comments.
- Please read our community guidelines. Self promotion and discussion of piracy is not allowed.
- Open a support ticket if you would like specific help with your account, deposits or purchases.
- Item Support by authors is optional and may vary. Please see the Support tab on each item page.
Most of all, enjoy your time here. Thank you for being a valued Envato community member.