Incubation

E|--------------------------------
B|--------------------------------
G|------7-----7--5---7-5-7-5----7-
D|---0-----0-----------------0----
A|--------------------------------
E|--------------------------------

E|----------------------------------
B|----------------5-----------------
G|----7--5--7--5-----5--------------
D|-0--------------------------------
A|----------------------------------
E|----------------------------------

Something like this is played in 
place of chords in Substance 
version:
E|--------------------------------
B|--------------5----8----5-------
G|-----5--7--5----5----5-----5--7-
D|--------------------------------
A|--------------------------------
E|--------------------------------

E|---------| 
B|---------| 
G|-5-------| 
D|---------| 
A|---------| 
E|---------| 

Chords in live version:
Continúa después del anuncio
E|--------------------------------
B|--------------------------------
G|-----12--12--12--12--12-----12--
D|-----12--12--12--12--12-----12--
A|-----10--10--10--10--10-----10--
E|--------------------------------

E|----------------------------------
B|----------------------------------
G|12-----12>10--10--10--10----------
D|12-----12>10--10--10--10----------
A|10-----10>8---8---8---8-----------
E|----------------------------------

E|--------------------------------
B|--------------------------------
G|------9---9---9---9---9------9--
D|------9---9---9---9---9------9--
A|------7---7---7---7---7------7--
E|--------------------------------

E|----------------------------------
B|----------------------------------
G|-9------9>7---7---7---7-----------
D|-9------9>7---7---7---7-----------
A|-7------7>5---5---5---5-----------
E|----------------------------------

Additional chords (both versions, 
toward end of song):
E|--------------------------------
B|--------------------------------
G|--14--14---14--14--14>12--------
D|--14--14---14--14--14>12--------
A|--12--12---12--12--12>10--------
E|--------------------------------

Hopefully, this is a reasonable 
facsimile of the guitar played on 
Incubation on
the Shadowply bootleg (or the Cross 
of Iron 7" which contains Incubation
 (Cross
of Iron) and the rather apocalyptic 
live version of Heart and Soul both 
from
the Shadowplay performance.)  Not 
included is the acoustic guitar Ian 
is
plinking on in the live version.