[otrs] Upgrading from OTRS 2.2 to OTRS 2.4

Hi All. Actually I don't know should I write to dev list or to user list... I'm using OTRS 2.2.5 and want to upgrade to OTRS 2.4.7, but I have some ugly hacks in 2.2.5 code. Most of them are in Kernel/Output/HTML/Standard/AgentTicketQueueTicketView.dtl file. It's some simple patches that changes visualization and adds additional queue. And as I can see there is no such file in new version. Can you please help me, in what files should I look instead? Thanks. PS Please add me to CC because I'm not subscribed to mailing list.