Hi:
It looks like you're already using a custom STYLE template for your output. The easiest thing to do to alter the title would be to look at changing the SystemTitle style element. Depending on the version of SAS that you're using, you may need/want to change the TitleandNoteContainer style element, too.
To put a box around the title, you would use the FRAME style attribute and you would also probably change the BorderColor, BorderWidth and Background style attributes as well.
cynthia