What do you mean by "running them through the very last package. " ? The update is very easy, put all new 4.6.3 files on your server and run update.php, it will automatically check the last update you went through (it must be 129) and then run 130 and 131 and that's it...
What I mean is that Drupal site doesn't make sense: "For the most trouble-free transition from an existing installation, it is recommended that you first upgrade to Drupal 4.6.2. "
And if you go see Drupal 4.6.2 you see the same phrase repeated with Drupal 4.6.1, hinting that I should patch each subversion on its own instead of just jumping to the last package available. Which doesn't make sense.
-HRose / Abalieno