Hi I've recently downloaded the latest (June 18) Mplayer Classic and K-Lite Standard codecs:
mplayerc.rev611.zip
klcodec-272-standard.exe

I can now play all sorts of movie formats including Quicktime and RealOne, but I cannot open my imported (US) DVD on my European PC with Mplayer Classic. Is there an easy point-n-click solution to this?

hmmm............
Weird, I've tested a European DVD and an Australian DVD, both worked fine on Mplayer Classic. Could it be that my US DVD is a double sided disc which my DVD-reader can't operate properly. Bacause it crashes Mplayer Classic every time :-(