Add header and customize landing page in Dalvar theme

Hello all & thank you for being here.  I am a new user of Elgg and am having probs customizing theme I applied...Dalvar.  I see the landing page is clearly customizable & suspect a header/logo can be added but cannot figure out how/where.

Any help will be greatly appreciated!  My community is at http://info4disasters.org/info4erc/.

Thanks so much,
Donna