Can I install jpeg6b and jpeg at the same time?

[Thomas]

Hi list,
on my system I have the current version of the JPEG library installed,
i.e., jpeg (jpeg8d), and it's activated and seems to work fine; the same is
true for openjpeg, as far as I can tell. However, a Python program I have
compiled (Frescobaldi, a GUI frontend for the musical typesetter Lilypond)
requires the module popplerqt4, which in turn seems to call an older
version of the JPEG library, because when I test if popplerqt4 can be
imported in a Python shell, I get this error message:
>>> import popplerqt4
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ImportError:
dlopen(/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/popplerqt4.so,
2): Library not loaded: /opt/local/lib/libjpeg.62.dylib
  Referenced from: /opt/local/lib/libopenjpeg.1.dylib
  Reason: image not found

I assume the older port jpeg6b would provide libjpeg.62.dylib, but when I
try to install it, this happens:
sudo port install jpeg6b
Password:
--->  Configuring jpeg6b
Error: jpeg6b has been renamed to jpeg. Please install jpeg instead.
Error: Target org.macports.configure returned: obsolete port
Log for jpeg6b is at:
/opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_release_ports_graphics_jpeg6b/jpeg6b/main.log
Error: Status 1 encountered during processing.

Hence my question is: what do I have to do to make both versions live
peacefully side-by-side, and is jpeg6b really the right port to use?
System: Mac OS 10.5.8, Python 2.6, Poppler 0.18.4, Qt4 4.7.4_1, pyqt4
4.9.1_0
Thomas
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