You have not given me alot to work with here.
THe "open file" node will let you specify a data type for the file. Try array of u8's to start.
THe Advanced>>>Data manipulation pallete has swap bytes swap words, split.....
The U8 can alos be converted to an array of booleans where you could use the "revers 1-d array".
Well those are the tools you will need. If you figure out more about the file format, we may be able to give you a hint as to how to assemble these parts.
Ben