[mkgmap-dev] Precompiled sea tiles contain no names - how to add names of sea, lagoons etc?

Hi developers, I use the precompiled sea tileshttp://osm2.pleiades.uni-wuppertal.de/sea/latest/sea.zip as mentioned on the mkgmap download site. Unfortunately the tiles do *not* contain names. How can I add the names (at least in English, local languages would be nice) to my maps? And no, precompiling on my own isn't the answer I'm looking for ;-) Thanks for your ideas, Joern