I have a Nokia E51 and can transfer files i.e. pictures, music (MP3) files etc. no problem via Infrared to the laptop. I want to know how do I send files from the laptop to the phone?

is the Infrared that's built into the laptop one way i.e. phone to laptop but not laptop to phone?

... or do I need to install some kind of special software that will allow me to send file i.e. music (MP3), pictures to my Nokia E51.