Adding Pictures to Left & Right Side of Header

Hi,

I am new to all this so my apologies in advance if I ask anything that is very simple or already addressed (I looked but could not find it).

Also, please keep in mind that I am not technical.

OK, once my new site using the WP TIGA 1.02 theme propogates, I want to add two pictures to the header, one on the left and one on the right…..like book ends.

How do I do this?

Many thanks!