.bflim files are layout images. They store not only minimaps, but also menu images, for example. Convert them using this script by Random Talking Bush (https://dl.dropboxusercontent.com/u/27874399/BFLIMtoGTX.bms) and then TexHaxU to convert the .gtx files into .dds. After you're done, use this script (https://dl.dropboxusercontent.com/u/27874399/BFLIMDDSFix.bms) to fix certain file headers and colours (the .bflim default is BGR, but you want RGB, hence this script's existence).