I found some oldies on my computer from the days when we could access Imagine China. They are from Imagine China/Gamma agency, specifically 23 November 2002, at a show jumping in Bois le Roi where Princess Caroline and Charlotte competed. Also there, pictured: Valentine Pozzo di Borgo, and the Roziers, and not pictured but certainly at this event were other Casiraghi friends like Eloise van der Hayden (who is now married and takes the name of Scrimgeour, which always reminds me of the Minister of Magic).
Eloise is pretty distinctive with her big curls in the oldie pics of the Casiraghi gang.
Charlotte phoning
Charlotte and Caroline
Caroline, Thierry Rozier, Charlotte
Mother and daughter ready to compete
Funny one, Guess Caroline is reminding Thierry he is Charlotte's trainer, not hers 
Inspecting the concourse
inspecting the concourse
laughing
beautiful
Charlotte and Thierry
And putting it all together, or trying to (pics from Getty, IBL, Novella 2000, Isopix, Reuters....)