[otrs] Adding custom columns in TicketOverviewSmall - OTRS 3.3

Hello dear list, There are to a few web pages describing how to add custom Columns in TicketOverviewSmall - for instance http://techiesfromthecradle.blogspot.ch/2012/08/customizing-otrs-list-views.... This doesn't seem to be applicable any more with OTRS 3.3 - the file has completely changed, as it introduces new capabilities like sorting / filtering. Do you know of any documentation on how to add more columns on this view, specifically: - Dynamic Fields - Fields coming from a DB Customer Backend (for instance customer Language) Ideally, I'd love to be able to sort / filter them as well :) Thanks, Olivier