There should be a log in the C:\Windows folder called WindowsUpdate.log You may need to copy it to the Desktop and open there, but it is a large file and may take a few seconds to populate.
If you look for a date around the time of the SP1 install failures you may see other error numbers to explain why the problem is occurring, or some indications of what is going wrong. You can search for "failed", without the quotes, to find problem areas, but it will also find many "failed = 0" entries which do not mean anything.
If you find a section you feel like attaching, do that or send me the file, or just list any other error codes and any comments associated if it varies from the 80200001 error.
You may also look for a svcpack.log in the same directory, but I could not find one on my system.