The acoustic version of Wound from the Machina demos shows how the later Pumpkins albums 
actually do have Corgan's best song-writing to date, but they are let down by the 
vision in production.

In the demo he is using some open tuning; you'd have to ask the man himself which, but 
I've heard theories about something like Drop C.

These chords are an approximation in standard tuning with capo on 3rd.

Gadd9   (3 x 0 2 0 x)
Em7     (0 2 0 0 0 0)
D       (x 0 0 2 3 x)





Gadd9 (listen to the track for the pattern, there's a kind of hammer thing from 2 to 4 
on the D-string)

Gadd9
Wound opens reveal a broken man

Soon notions, blood on his hands
Em7 (I just sort of flick from Em7 to Em here, listen to the track again here)
Stop, stop, pop tart
              C
Taste of your demands

       Am7
If you wait, I will wait
       Em            D
If you taste, I will taste
       Am7
If you run, I will run
       Em           D
If you love, I will love
     Am7
To my last prayer

Gadd9

Tomb opens reveal a stack of gold
Cool poison, the taste of growing old
Sit down, downtown
In your tower of steel

       Am7
If you wait, I will wait
Em            D
taste, I will taste
       Am7
If you run, I will run
Em           D
love, I will love
     Am7
To my last prayer
   Em        D
My last prayer
     Am7
To my last prayer

D (in the demo this is some nice inversion in the opening tuning that we can't get here)

Am7           Em            D
Wound opens reveal a broken man
Am7           Em           D
Soon notions, blood on his hands

(the Am chords in this next chorus are different too. I just use Em7 instead of a plain 
Em to get a bit of variety here.)
       Am7
If you wait, I will wait
Em7           D
taste, I will taste
       Am7
If you run, I will run
Em7          D
love, I will love
     Am7
To my last prayer

Em   D

       Am7          Em7  D
If you wait, if you wait
       Am7          Em7  D
If you wait, if you wait

Gadd9