Building KSEG should be simple.

Be sure you have the necessary libraries correctly installed,
namely Qt 3.x or later (with zlib--I think Qt comes with it) and the
standard C++ libraries including the STL.  Qt 2.x should also work
theoretically.  Also, make sure the QTDIR environment variable
is set to the directory where Qt is installed (so $QTDIR/lib has the
acutal library and $QTDIR/include has the include files).

Then in the directory where you untarred KSEG, type make and
it should work.  If it doesn't, you can try editing the
Makefile--it was made by hand and is easy to edit.  For example,
if your Qt is multithreaded, change "-lqt" in line 5 of the
Makefile to "-lqt-mt".

In order for help to work, the help file, kseg_help_en.html,
must be in the same directory as the language files (*.qm)

Good luck!
