I wrote it while I was using 2.0.1, and as long as the database structure for post and thread is the same, it should work a charm.
One thing: MAKE A BACKUP! I can't stress this enough! When I was making it, I screwed up all sorts of times, and at the state it's at now worked on my board. What you might do is like I did: edit the script for your preferences, backup your database, set up a testing board locally (glad I can get php/apache/mysql running on my windows box!) and install your backup on that test forum, and then run the script. Look through your posts to make sure they all corrospond (During testing I had thread titles that were to the wrong posts, and some threads with no postbit at all!) and if all goes well, run it on your public forum.
BACKUP!