Not all apps can to open file from command... but need to try it! Example for KMPlayer:1. Try to run from terminal. "kmplayer" -> not found 2. Okay, then go to "/usr/share/applications/hildon" and reading ".desktop" file. "kmplayer.desktop" Exec="/opt/kmplayer/bin/kmplayer" It's path to binary - u can run it! 3. Try to run from Hamster. "/opt/kmplayer/bin/kmplayer %s" -> it's work - release & happy "leafpad %s" -> working. "evince %s" -> working too. .... I think it's good feature request - preinstalled examples for applications, OR better - "Open with..." show dialog with list of applications, loaded from .desktop files - choose and auto add name and command with %s param favorites in top - it's really like "Open with...". And for commands other item menu...