Just for the record, all modern European PAL DVD players, TVs etc will play NTSC DVDs, so sending a PAL DVD to Europe is not an absolute necessity. The opposite is not the case however – the great majority of NTSC machines do not play back PAL formats.
If you’re not sure, you can send over an NTSC DVD as a test…
Just my 2 Euro-cents (Danish Krone, actually)