I'd like to create a new ticket layout for our needs (either via CHANGES/CMDB (ITSM) toolbar or TICKETS -email / phone (OTRS)). It would basicaly be like screenshot below (radio buttons/dropdown menu, freetext fields + ability to link this ticket to specific computer / user / service / switch):

ITSM should be good way to do this, however the lack of documentation for ITSM 3.0. and examples are making it difficult for me to fix this. I'm asking for some general directions, any help would be greatly appreciated.