Hi STU3UK, what is making you really confuse about with the CFO seminar?
As what i could remember when i did mine nearly two years ago was i went there in the office in the morning to register myself(you really have to be early cos they're only doing seminar for a number of people in a day) then if she's lucky enough to go there where there's a schedule for UK then in the afternoon she'll be required to go back and attend the seminar. After that, if she got all the documents needed or required then she'll get the stamp after she's finish(I think its in the different building as well).
If your gf got the number of the CFO it would be better for her to give them a ring and ask for the schedule so for her to know what to do. Nothing complicated in this step really.
Hope this one helps.