i've create a RunOnceEx method installation but i've a problem on the first part. REG ADD %KEY%\005 /VE /D "Microsoft .NET Framework 1.1" /f REG ADD %KEY%\005 /V 1 /D "%CDROM%\Apps\netfrwrk\netfx.msi /qn /norestart" /f this is my string. The problem is that when the command is executed, the .Net frameworks gives me this message: "Insert .NET Framework disk". Why? Is because it starts from cd? TNX all again.