She should sign up for an Eventing Clinic - I would be interested to hear what the clinitian would have to say. If it were Dorothy Crowell, Bill Hoos, Darren Chaicchai or even Jim Wofford - they'd put her in her place before she could blink an eye.
You should have her read Jim Wofford's articles about progressing up the levels before you should be. He clearly states that you should spend minimal 1 year at 1 level before you progress, and you should place top 3 minimally at 3 recognized USEA Events.
So for example, before I progress to Training Level - I should spend a full season at Novice and place top 3 for minimally 3 recognized events. Not unrecognized - those don't count because non don't have to follow regulation heights or difficulties.
Your friend, is going to get hurt - back to Jim Woffords articles - he clearly states that riders such as your friend, are the reason why Eventing is getting a bad name because of the 1)
Lack of respect for the sport/fences 2)
Over facing themselves before they are thoroughly trained - and prepared mentally and physically.
But with riders like her, who are putting themselves before their horse - I have no respect for. I am more concerned for her horse who can only follow his rider. She is one of those riders who more than likely will go through horses like toilet paper.
Have her read Jim Woffords articles and the # of accidents that have occured in 08' due to riders like her. I wouldnt beable to keep my mouth shut - for both their sakes...but I would most definitely have your Instructor have a discussion with her before they head oversea's.