Score your pilots. Probably using bulk XML file (my preferred way) or direct to RACE.
Once everyone has handed in their GPS and you downloaded the tracks, feed all the XML bulk files to RACE.
Close down any open RACE session.
On the master computer, that has the shared competition directory and which got RACE installed, in TP load the task and use
Menu RACE / GAP>RACE
This calculates for each pilot the Lc factor and updates it in the RACE database.
After this you can run in RACE with GAP 2002 the final scores and get your results.
Every track that gets scored updates on the shared Competition Task directory a file called GAP2003.csv.
Once everyone has scored we can calculate the first and last pilot times.
And with this info determine the Lc factor.
More info see GAP2003 Lc factor specs
Reference on GAP see http://www.metamorfosi.com/GAP2002_en.htm