diff --git a/science/opensph/pkg-message b/science/opensph/pkg-message
new file mode 100644
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+++ b/science/opensph/pkg-message
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+[
+{ type: install
+  message: <<EOM
+You installed OpenSPH: a tool for running SPH and N-body simulations.
+
+In order to see how it works please open any of the *.sph files in the
+source tree with the opensph executable, and choose the Simulation/Start
+menu item.
+
+EOM
+}
+]