Socal_infidel, thanks ever so much for putting together this modification! While I already enjoyed the game previously, PDeR makes it far more entertaining than previously, and, like said elsewhere, makes it more like a Crusader Kings-type game. It works very well indeed.
I have a suggestion or two to make, however. I'm a history student specialising in the middle ages, particularly in the history of the Low Countries back then, and I have to say that the name "Friesland" for the province with Utrecht is a bit off for the period. Geographically, the province should be called Sticht or Holland. Personally I prefer Sticht, as that was the bishopric of which Utrecht was the capital, and Holland was in 1080 entirely insignificant.
Friesland, in any case, was located more to the north than your province of Utrecht, and it's heartland was along the north sea coast, not actually included in the current territory.
Also, if it's possible to add any further provinces, I'd like to suggest Liege (the name for both province and city). The Low Countries currently has quite a gap in the south-east, which seems somewhat peculiar considering it was the area with the highest population density north of the Alps, and Liege was a city with both a massive population and a politically important ruler (another bishop).
Here's a map of the medieval Low Countries (about 1450; Liege is called Luik):
http://img505.imageshack.us/img505/5...untriesbp1.jpg