The LFLF block is the container for a "room" (in quotes because in some games it may only contain music for other rooms etc.).

"LFLF"	dword	Block identifier
dwSize	dword	Size in bytes (BE)
blROOM	block	ROOM block.
(
blRMSC	block	RMSC block (only in CMI).
)
(
followed by sub-blocks (depending on the need for them):  SCRP, SOUN, AKOS / COST, CHAR.
)