Hi Barry – thank you.
OK. Step one is solved. Here is an IIS host treatment that worked:
http://einaregilsson.com/pretty-wordpress-permalinks-on-iis/
(using the download link in instruction item #1, not copying the php lines actually in the post).
At least now the custom pretty permalinks work, and CE is working.
There are other problems such as the CE list not displaying events submitted, and the text on the submit form is cutoff (maybe there’s a css paragraph setting somewhere with a top-margin). I’ve seen similar problems solved elsewhere in these forums, so a-hunting here I go!
Thanks.