Right I have Eclipse 3.4.2. installed on windowsXP.
I went to eclipse/help/software updates and added the url http://lunareclipse.mainiero.de/update.
I got an entry for LunarEclipse v1.2.8 and an install started. I accepted the license agreement.
I now have a Lua entry in eclispe/windows/preferences.
For the interpreter I visited http://luaforge.net/frs/?group_id=377 and downloaded...
2009-03-26 15:30:27 UTC in LunarEclipse