I am not sure what you are asking, but I surmise you wish to Expand the contents of 7565xdat.exe.
If so, the command is:
7565xdat.exe /E C:\Extract\Dir
/E is the parameter to Extract
C:\Extract\Dir is the directory in which to place the files. This parameter is optional. If not given the extraction is done in the current directory.
Hope this is helpful.
Thanks for replying .. I think i was not clear in what i was asking, one of my friend just asked me about this DAT file used in VSE, i explained him why it is needed then suddenly he came up with a question asking "what is the abbreviation of DAT, if there is no abbreviation then why did they name it as DAT particularly" ... so, now i am searching for answer