Have you been through the Calculation tutorials. e.g
http://community.landesk.com/support/docs/DOC-26677
Those are a good place to start. There are then various BOO web sites where you could look up code snippets, learn how to do general BOO stuff and so on. If you want get some specific help in the UK on writing this type of stuff for you, then I'm sure the LANDesk consultancy team in Bracknell would be glad to help you with some services.