Here's more info on Sylvia Millecam. Turns out she died in 2001, of breast cancer. How sad.
http://en.wikipedia.org/wiki/Sylvia_Millecam
http://www.imdb.com/name/nm0587799/
"Het Beste Van Vierkort" isn't listed on IMDB so maybe that was just the name of the episode.
Fango