Phoca Gallery Modification

I need my phoca gallery modified. I have a page where I list all categories for my photos, I want that when clicked on a category the first photo of the category opens automatically. My joomla is 2.5 I won't be able to pay more than $20, that's a very simple modification. Please check the file attached for more explanation and only bid if you can show me a sample of what I need. ATTENTION: BIDS HIGHER THAN $20 WILL BE IGNORED... THE PROJECT WILL BE AWARDED FOR THE ONE THAT SHOW ME A SAMPLE OF WHAT I'M ASKING. Thanks,