I'll let you know if I can play them when I've downloaded them, as I use Linux now... So I don't know if I'll have codec issues or not
As for windows, I found using the klite codec pack, full pack (About 8meg) played just about anything that I needed, do a google on it, should be able to find a free site hosting it (The official site requires registration or something, and I hate the spam that comes with it, their anti spam policies or not!)