photopress - how to make a header picture 'active'

[nocurling]

i am using the photopress theme which i love. i've changed it slightly to have a small image as part of the header. i'd like to make that image 'active' so that if someone clicked on it, they'd get a much larger version of the picture. is this possible within this theme? i'm a wordpress noobie and cannot figure out where to make this change.

to see the header go to nocurling.jeepaw.com

thanx,
nocurling

[kalo0067]

very nice fend