During most of the download process of these past papers you might find that the links go dead or not working at all. This event occurs based on two reasons - they have been ordered to be removed or scraped from those sources. Thus, I tend to keep hard and soft copies.
If you go over to the Education tab, there's a lot of updated past papers on the CXC Past Paper page. Please take the time to share with friends becausse the resources are not limited to you alone.