The chords to Jumpin` Jack Flash (as I hear it) are B, D, A, 
and E. The opening riff (also, the middle section) is just 
B-E-D repeated (3 times for the intro, 4 for in the middle) 
followed by B strummed a few times. 
 
During the verses, the riff is the simple

INTRO: BASS RIFF ARRANGED FOR GUITAR 
 
E|--------------------------|-------------------------| 
B|--------------------------|-------------------------| 
G|--------------------------|-------------------------| 
D|--------------------------|-------------------------| 
A|---------------3----------|---------------3---------| 
E|--0-3--5-5-3-5---5-3-5-5--|-0-3--5-3-5--5---5-3-5-5-|

INTRO:  CAN PLAY:   A   D -- 4x`s   AND/OR: 
 
                                                            D 
  E ---------------------------------------------------------5-- 
  B ---------------------------------------------------------7-- 
     sl.       sl.sl.         sl.                    sl. 
  G -7/9*--7---6/7*/9*--7---6h7/9*-9--7---6h7-9-9----9/7*----7-- 
       NOTE: *-means do not strike the note. 
  D ---------------------------------------------------------7-- 
  A ---------------------------------------------------------5-- 
  E ---------------------------------------------------------5--

D              C 
 My sweet Lady Jane 
                  G 
 when I see you again 
D                C 
 Yoyr servant am I 
                    G   D 
 And will humbly remain

Intro: C-Csus4-C-Csus4-C-F-Fsus4-F-G 
 
C                          F 
We all need someone we can lean on 
           G                        C 
And if you want to, you can lean on me 
                           F 
We all need someone we can lean on 
           G                        C 
And if you want to, you can lean on me

INTRO:    E        A  -- 4x`s 
          /////    / 
 
VERSE: 
      E 
       You`re gonna get it straight from the shoulder 
      A 
       Can`t you see the party`s over 
   E  B       A  B 
       Let me go

Chords: 
 
A5   x022xx 
Bm   x24432 
C    032010 
D    xx0232