unpacked size? FPS4 contents not packed, sector size nearly equal the file size
for example, look on AMUI01_TEX.BIN in m.b
file size = 0x2B7C4
unpacked(?) size = 0x2B7D0
unpacked size is AMUI01_TEX.BIN + null-bytes
another look on FLDM00P.SCP, file size = unpacked(?) size, but he packed