seperate some post from the rest – plugin?

My suggestion would bee to:

1. Create a category named “Photos” or something like that.
2. Add all of your photo posts to the “Photos” category.
3. In your loop add a call to the in_category(#) function replacing the hash sign with the ID of your “Photos” category. you can read about the use of this function here: http://codex.ww.wp.xz.cn/Template_Tags/in_category

i do something similar to this on my blog (link in profile) which lets visitors know whether the post excerpt is from “Art”, “Web” or “Design” – all of which a categories.

Hope this helps…
Good luck!
-Mike

ok…
Did you try this:

“In your loop add a call to the in_category(#) function replacing the hash sign with the ID of your “photo series” category. you can read about the use of this function here:”

The code would look something like this:

<?php if ( in_category( '14' ) ) : ?>
    <!-- Special html for only photo series category. -->
<?php endif; ?>

You can place this code anywhere in the loop – just replace 14 with the ID of your actual photo series category.

Your code looks good to me. Yes you should put it where ever you want it to be displayed. I don;t know how you have your blog set up. If you are not using a static homepage – then add the code inside the loop in index.php. This will make it work on the homepage, if you have other template files that display posts from multiple categories, you’ll want to add it to them too.

Hope this works for you!