I don't know about exporting from Moodle quiz to Hot Potatoes, but with the new version of the HotPot module it is possible to export from Hot Potatoes to the Moodle quiz. Check:
http://moodle.org/mod/forum/discuss.php?d=20117
Josep M.
Quiz
Hot Potatoes
تم تأمين هذه المناقشة لذلك لم يعد بإمكانك الرد عليها.