This posting is older than 6 months and can contain outdated information.
Hi Daniel,
creating a new/own behaviour is really simple with Remote Buddys "Behaviour Construktion Kit" if the application, in your case justlook, supports keyboardcommands.
just add some actions you want to execute in the "Action Factory" and assing the according keystrokes under "Implementation".
then make a new behaviour in the "Behaviour Factory".
drag the application (justlook) on the "Bundle Identifier",
rename the identifier further down under Metadata to something you like. in the next tab add the actions you created before.
in the last tab you assign the actions to the buttons of the remote.
you can also assign an "command & q" keystroke to "on deactivation", which would close the application if you switch to another behaviour on the Bemote Buddy menu.
finally you just have to compile/testdrive/install the bahiviour by clickin the little wheel icon next to "+ -".
thats it. the behaviour should now be available in Preferences.
hope that helps