Greg, thank you for the information and sorry to reply after two weeks...
holidays were good

Now however, I am back at my desk and trying to figure out the problem of
multiple choice questions. I visited the sites you recommended and installed
the Office Service Pack 2, however I still don't see a difference.
You mentioned in your note the existance of an "Active X control" for
infoPath, is this a stand-alone download, or it comes with the SP2?... and if
it comes with the SP2, is there a way to know how to access it, or how to
make it work?
Any help will be really appreciated. Thank you very much.