For 986LCD-M/mITX use the files:

986LCD-M mITX ServicePack 3.slx
986mitx_sp3.sld (in "986 Main Devices").



For all other 986LCD-M board (ATXE, ATXP or Flex) use:

986LCD-M ATX ServicePack 3.slx
986atxp_sp3.sld (in "986 Main Devices").