Hi there, Thank's for this great tool. I'm currently trying to put some changes in my files HIVExxx.inf in i386 of an XP SP3 install CD. Without success because those files are in UNICODE. I'm trying to do some changes like: fedit -add -f "HIVEDEF.INF" -s "AddReg" -l "HKCU,\"Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\",\"StartMenuAdminTools\",0x00000000,\"YES\"" -once fedit -add -f "HIVEDEF.INF" -s "AddReg" -l "HKCU,\"Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\",\"Hidden\",0x00010001,0x00000001" -once fedit -add -f "HIVEDEF.INF" -s "AddReg" -l "HKCU,\"Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\",\"ShowCompColor\",0x00010001,0x00000001" -once Doing it on UNICODE file results in an unreadable file as result. While converting *.INF files to ANSI before doing changes with fedit gave me the awaited result. If you do not plan to integrate support for UNICODE in your tool, there is a workaround. Just convert the file to ANSI before the change. I did it with StringConverter. This free command-line tool can be found at this address Thank's again ! Myrmex