to change catorise icon to your own icon use filebox & go to this path... usr/share/icon/hicolor/64x64/hildon the path above is the default path for all catorise icon...you need to change these icon (remember to make backup for these icon aswell).... app_install_all.png app_install_desktop.png app_install_development.png app_install_education.png app_install_games.png app_install_graphics.png app_install_multimedia.png app_install_navigation.png app_install_network.png app_install_office.png app_install_other.png app_install_ovi.png app_install_science.png app_install_system.png app_install_utilities.png change these icon but remember the icon size must be at 64x64... here is the example after i have change the catorise icon on my n900....