It will be region free and as far as I know the ski dvds are both PAL and NTSC. So you should have no problems!
You may have to pay more for import tax/customs duty as it's coming from America. To avoid that may I suggest getting it from a European store. Here a few (including mine):
http://x-tremevideo.com
http://www.freezeproshop.com
http://ame-ski.co.uk