Hi, I need to compare all my files in all directories & subdir to a "Specified File" in binary to check whether they are similar, using FC /b. Is it possible? Else, i ECHOed all directories using ATTRIB /s to a .txt file and wishing to have a solution (batch file ) to replace the attributes and insert automatically: FC /b "mydirectory" "my specified file" ...then ill rename it as .bat file to execute all commands. Does anyone know how to replace and insert text in the beggining using DOS command? THANKS in ADVANCE! =) PS this is the ECHOed ATTRIB /s in *.txt: A Z:\01.exe A S D:\02.txt A SHR Z:\asdf\03.exe A Z:\asdf.ed This is what i need: (ert.txt = my specified file) FC /b "D:\01.exe" "C:\ert.txt" FC /b "Z:\02.txt" "C:\ert.txt" FC /b "Z:\asdf\03.exe" "C:\ert.txt" FC /b "Z:\asdf.ed" "C:\ert.txt" --------XD-------ajukason----------