Hey Jason,
Worst thing you should do is do this stuff while partialy drunk and on the way to a hangover
Anywho, it took a while, but you cant upgrade from B5 to RC5 *officially*. PHPBB dont support it. I did however, find some startrek named forums for PHPBB3 and one chap wrote a script to upgrade from B5 to RC1, which I did successfully (after I had to restore my old B5). Tommorow, well, i guess today, so ill say, whenever I get outta bed Ill work on going from RC1 to RC5 which seems to be allot easier.