Hi!
so a kind of user-friendly "setup.php" :)
Since I like this idea, I'll try (to find some time to) code feature #601016. Only, of course, if you don't have any objections. ;-)
I like the idea as well! Would be great if you find the time to code this. I will then only issue a warning (don't know on which pages yet, but I'll find the appropriate places) if old comment-tables are found and point to the script provided by you. :)