The is how Bob plays the intro off of the Beyond Belief movie that 
Petra made in a time before DVDs.  Some of the strumming may be wrong for the
quick parts with lots of strumming...so just use your ear for those parts.

e-----------------------------------------------------------------------------
b-----------------------------------------------------------------------------
g-----999-------------------------------------------------99999-----99999-----
d-----999--------77-777-----------99-99----9-------99-999-99999-999-99999-----
a---------119-9-77-777--9/11-11--99-99----9-11-11-99-999-------999-----------
e---------------------------------------12------------------------------------

e-----------------------------------------------------------------------------
b-----------------------------------------------------------------------------
g-------------------------99--------------------------------------------------
d--999-99999-999----------99--999-99999--------99-777-77777-------------------
a--999-99999-999-11-11-11-----999-99999--11-11-99-777-77777-999-11-11-11------
e-----------------------------------------------------------------------------

e--------------------------------------
b--------------------------------------
g----------999-------------999---------
d------999-999---------999-999---------
a---11-999-------11-11-999-------------
e--------------------------------------

Here are the basic chords as well - Bob probably used more complex 
versions of them because he ussually does.  But this should help.

Verses:
E  B  A  B  A  B  E

Chorus
E  B  
C#m  B  E
C#m  B  E 
E  B  
C#m  B  E
C#m  B  E     (B*) 

*Hold the B durring the whoa!!!!!! part 
which is into the intro solo when it repeats   

Bridge
A B C#m E C#m  (Quick)
A   B
A B C#m E C#m  (Quick)
A   B
E A E A E A E B

The bridge goes right into the solo.  Someone else has already tabbed 
the solo pretty accurately
So I wont bother to resubmit the same thing.
This song is really fun to play and jam with.  I hope this helps you.
There may be mistakes I dont feel like checking it over.
God Bless