JvM

I have a website now with a lot of pictures loaded from a rss file (from somewhere else on the internet). I use a Zend_Paginator to show all the images on different pages (otherwise there is too much info on one page). However it takes a while to load the RSS file and process it to a nice data array. Now when I click on the next page button it has to do the process all over again. Now my question is how to do this in AJAX with Zend Dojo. I found somewhere I should use Zend_Dojo_Data, however I don't know how to proceed. Could you help me out with an example or tutorial? Thanks