Navigating the app store with NVDA

Hi, I was wondering if anyone could help me out with this. I'm trying to use the iTunes store on my PC with NVDA screen reader, but am strugling to navigate to things such as an app description or ratings and reviews that people have left. Could anyone give me a few tips with things like key strokes I should be pressing or something? Before I've just had to tab through the app store untill I find the link that I want, then press enter on it. The page loads after a few seconds, then I can tab to the buttons for details, ratings and reviews, and related apps, then I just get a show all versions link then back to the standered buttons, like libery and volume. The arrow keys don't do anything on this page. Incase this helps, I'm running the latest version of NVDA and iTunes on windows XP. Any help would be appreciated. Thanks a lot.