The hard part will be the actuall editing of an existing post.
then the insertion/filtering of the html or bbcode to make it look nice.
If the "import" routine can't find the appropriate tags, it should just insert all the text into a text box (comments) and the data that should be in specific fields can be copied/pasted by hand into the correct field on the form.
Another nice feature could be a "Favorites" which would be to filter on your boardID, to make it easier of people using this to update their own UDFs
