You can unpack the PSE archive using following command:
$ tar zxf PSE-X.X.X.tar.gz
where X.X.X is the version number of PSE you are installing. You can also use your favorite unzipping program if you download the zipped version of the archive.
PSE will be extracted into a subdirectory named PSE-X.X.X
where X.X.X is the version number of PSE that you extracted.
You should change directory (
cd) to this directory.
Then, to actually install it, you should run setup.py with the install command:
$ python setup.py install
You may wish to check out the options for install first by passing in the -help option to setup.py.