OK, here's the riff for Ventilator Blues. It can be played in standard tuning or 5-string open G:

e----------------------
B----------------------
G-----0-0-X-3-X--0---0-
D-----0-0-X-3-X--0-3-0-
A---1------------------
E-3--------------------

d----------------------
B----------------------
G-----0-0-X-3-X--0---0-
D-----0-0-X-3-X--0-3-0-
G-0-3------------------
D----------------------

X = hit strings with right hand

The chords over the chorus part are Gm - Bb - F - C

Have fun,

Koen.

--

"I've always enjoyed the five-string tuning. (...) It's five strings,
three notes, two fingers and one asshole!"   -   Keith Richards