How 2 open .dat :(

Hi 4chan. Please help me open these darn .dat files.
They have an .xls (excel) file in them... but I don't know how to open this .dat file.

You can get the .dat files here: http://www.megaupload.com/?d=PHJBAT6L
or here: http://files-upload.com/247181/Language.rar.html
they're in a rar.



You're my only hope!

xor is as secure as anything as long as you use good random data as the key and you DON'T FUCKING USE THE SAME KEY MORE THAN ONCE.