Very easy. Have you installed the latest version of PC suit (v6.7 or above) ? Then all you have to is open PC Suite, click on view multimedia, which opens the Nokia Multimedia Player. File> Open and open the file that you wanna convert. On the bottom right, you can select the resolution and size limit you wanna convert it into. Open it. You'll find an icon next to the stop and play buttons. Hit it and it'll ask you where to save the file. Select your location and press OK. It'll convert. Send it to your phone !