The reason verbs like this do not exist for other bands, is because not all bands can be listened to for a long amount of time, without getting boring.
Usually, iTunes is used to Kookage. But Sometimes MP3 players etc. can be used. In most cases, at least 15 or more songs are needed to Kookage.
A true Kookager will try to get his/her hands on every Kooks song avaliable, through any means possible.
Quite often, 'Kookaging' can be used in one's Facebook status.
For many people, Kookaging is a hobby. It's something they like to do when they are feeling down, or why they are feeling up, or... in fact, in any mood.