I'm sorry you still have got problems with those ISOs!
As suggested in the post above, it might be a better idea to get the CDs from a reliable source instead. I don't know where you're located, but I can highly recommend this site:
This is run by a lovely Linux addict who offers CDs, including mandrake 9.2, 9.2.1 (9.2 with updates) and 10.0 (Community) for $/Euro 2.00 per CD!
Also check out this site:
Getting the CDs will probably be easier, especially if your internet connection is slow and it takes a long time to download the images.