japanwindow, unfortunately i'm new to Pixelpost and cannot help you further with your query. Hopefully someone else is reading your message and can give some advice.
My other problem which i'm desperate to solve sometime soon is [i also have a photoblog] to be able to upload at least 5 photos within a category. Let's say i went out to the park and took 5 photos, put them under the 'park' category then under that category, are the other photos taken that day in the park. Geddit?
Do you think that's something i can achieve in 'today's images'? The problem with addons in pixelpost site is that there is no snapshot of the actual addon so we can visualize the effect it will add on site.