Convert "sis.dm" to "sis/sisx" format
Some Symbian application installation files downloaded from OVI Store using "Download OVI Store sis/sisx Installation Files to PC" method post appears to have ".sis.dm" as the file extension. In order to use the installation file to install to any Nokia phone, the content of the installation file need to be modified. Note: By simply renaming the extension will not enable the installation file to install to Nokia phone. Follow these simple steps and you shall get the installable sis/sisx file. By using a test editor, open the ".sis.dm" file. Once opened, you will see in the first 3 lines of the file that looks something like this: --boundary-1 Content-Type: x-epoc/x-sisx-app Content-Transfer-Encoding: binary Delete them! Delete them until before the "z" character. Save As a new file with the same filename but with ".sis" extension. The installation file is ready to install in your Nokia phone.