FWIW I got this plug-in to work (like a charm).
You need Scipy 0.4.8 (newer versions do *not* compile on FC5).
I got it here: http://prdownloads.sourceforge.net/scipy/scipy-0.4.8.tar.gz?download
Followed (most of) the instructions here: http://www.scipy.org/Installing_SciPy/Linux
I didn't copy anything to usr/local - just did 'python setup.py install' as root. You'll need to go grap some coffee after that one.....
Chris