Have looked through all those links. This one - http://msdn.microsoft.com/en-us/library/aa984621(VS.71).aspx says for my error:
"If the FrontPage Server Extensions are installed, this error may occur
because the _vti_bin virtual directory is not marked executable. To
correct this problem, run the Internet Service Manager, select the Web
server having the problem, and use the Check Server Extensions task"
When I select the All Tasks -> Check Server Extensions 2002 an IE browser window opens, the url is http://[myserver]/_vti_bin/_vti_adm/fpadmdll.dll?page=health.htm but it gives:
"
You are not authorized to view this page
You do not have permission to view this page using your current user account.
Please try the following:
If you have another user account with a higher level of permission, click
your browser's Back button to try again using that account.
If you believe you should be able to view this page, contact the Web site administrator."