iMaker  --file=/epoc32/rom/config/sf_refhw/syborg/image_conf_syborg.mk  flash
files generated into epoc32\rombuild\syborg\core

copy \epoc32\rom\include\featuredatabase.xml
copy the syborg.rom.oby to syborg.stem_rom.oby
Put back 
  ROMBUILD_OPTION -no-header 
  define ROMDATE ##TODAY##  
convert mbm_rom statements back into source form  
  ->  s/data="(.*mbm)_rom"(\s+)"(.*)"/auto-bitmap=$1$2$3/ 
Fix buildrom.pl to leave aliases to .RSC files alone (and not move them into sys\bin)

buildrom syborg_stem_rom.oby -fm=featuredatabase.xml -k -nosymbols -loglevel1 -v