See if you can find answer from one of the sites on this link. The 3rd one down sounds like a possiblity although, I know you don't have any way of knowing what program created them Hope this helps.
here is the story.... back in 94 my brother did some writing on my pc.. im not sure what program he used but when he saved them to a disk (which we dug out of his junk this morning) the documents were saved as .bak files. i cant figure out how to get them to open... if you have any ideas or want to take a crack at it you can find the file at:
any help would be appreciated ( =