How to obtain SPARX/EMAN2/SPHIRE
SPARX is available from SPHIRE download site (Note clicking the link will take you to SPHIRE pages): http://sphire.mpg.de/wiki/doku.php?id=howto:download#how_to_obtain_sphire.
How to install EMAN2/SPARX
The easiest way of installing EMAN2/SPARX is to use the binary distribution, which is also strongly recommended. Please follow installation instructions available on SPHIRE page http://sphire.mpg.de/wiki/doku.php?id=howto:download#how_to_obtain_sphire.
If you are interested in knowing the details of implementation or plan to write/revise low-level C++ codes, you may also build SPARX from the source code, but it will be considerably more difficult.
Verify the release date
sx.py Util.version() quit
Install from the source code
Detailed step-by-step instructions can by found in SourceCodeInstallation.