printf "%s\n" LATCUR_ecmwf_5N_17062812*.png > LATCUR_ecmwf_5N_17062812.lst
anim2html LATCUR_ecmwf_5N_17062812.lst > LATCUR_ecmwf_5N_17062812.html

Or, just simple add additional png file to html to mkmovie00_ecmwf or mkmovie12_ecmwf