I want insert new string in txtsetup.sif with batch script. Example: this txtsetup.sif content, [SourceDisksFiles] bootvid.dll = 1,,,,,,3_,2,0,0,,1,2 kdcom.dll = 1,,,,,,3_,2,0,0,,1,2 c_1252.nls = 1,,,,,,3_,2,0,0,,1,2 c_437.nls = 1,,,,,,3_,2,0,0,,1,2 and i want add under the [sourceDisksFiles] this new string, example.dll = 1,,,,,,3_,2,0,0,,1,2 and result must like this [SourceDisksFiles] example.dll = 1,,,,,,3_,2,0,0,,1,2 bootvid.dll = 1,,,,,,3_,2,0,0,,1,2 kdcom.dll = 1,,,,,,3_,2,0,0,,1,2 c_1252.nls = 1,,,,,,3_,2,0,0,,1,2 c_437.nls = 1,,,,,,3_,2,0,0,,1,2 How can i do bat or cmd script for this? Thanx for answers...