Help read data from DAT file

Hello everyone.
Everyone know about the Mummy Maze Game of Popcap, right? I want to make a game like it with cocos2dx. I want to read its map data, so I download the game and see its content. But all map data is .DAT file, and can't be read :(
So how can i open it? Or i must know how popcap created it?
I know it is a stupid question, but hope someone can help me. I uploaded a simple file here
http://www.mediafire.com/download/773q974urbzfjbl/B-0.dat
Please have a look and see if you can help me.
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