Have a look (a search) on the bitzi site to see if there's been any commentary on the particular files you're trying to dwnld. This 'might' answer part of your question. Also if you click/double-click at the top of any column of the search window, it'll be sorted by that criteria. Likewise if you hit the # the most commonly found (most sources) will be sorted/displayed at the top of the window. That will help you to know which ones are popular & easiest to dwnld & hopefully corrupt free.