I've just spent the afternoon making this header.....searching for guidelines, finding photos, downloading picasa, and finally actually making it!!.
I followed the information provided in this post by Clover Lane on how to do it, and found it quite easy to follow. the hardest part was not having enough photos to choose from, so consider this header draft #1, and once i have more choice, i'll make a new one....one that fits all the way across the top!.
the photos are all mine and are: l-r tulips from Chelsea Flower Show 2010, a road in Oxford North Canterbury NZ, and miss lilly puss back home in Christchurch.
oh, and the reason i currently dont have many photos to choose from on my computer is cos i had to do a factory restore recently and havent put many pics back on it yet!.