> Wasn't it mentionated once that the IE-people belonged to
a "cultural
> group" but not to a certain ethnic group?
>
> Alex
Yes, just like the Turkic peoples are a cultural/linguistic group.
You can find both "Asian" and "Caucasian"-appearing Turks and just
about everything in between. The reason: early Turkic speakers had
superior technology and a warrior culture that let them spread their
influence across Central Asia and eventually into Europe. They
absorbed numerous people that previously spoke languages belonging
to other families, including Indo-European over the course of 2,000
years.
The Indo-European expansion similarly absorbed numerous different
peoples speaking many different languages about which we know little
if anything. And since the last ice age had passed and people had
been freely moving around Europe for several millenia, we can't
predict the complexion of the earliest IE speakers, even if we
accept a more northerly latitude for their homeland. Look at all the
swarthy Chechnyans at roughly the same latitude as Ukraine.