Saved me a lot of time! I ran the alter for Posts and Thread tables separately via the command line due to their size on my 11m post forum, but converted all the other tables via phpmyadmin using this code.
Very timely for me, as I was just looking for a guide on this to make sure I converted the correct tables. This saves me from having to look up the XF 'create table' calls in the install script. Thanks!