You can easily update your database to the 4.3 format.  You just download the 42to43.sql file and source that into your database.  I assume not much changed from 4.1 to 4.2?
Quoted from 
http://forums.eqemu.net/viewtopic.php?t=6349
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				http://www.darogar.net/42to43.sql 
 
And something important Izagod forgot to mention, Becarefull for this will completely destroy your faction table, and don't forget to source the npc_spells_id.
			
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