I have my Xperia X1 3 dayz now and imported all my contacts from simcard.
I had them all in groups (friends, collegues , clients etc.) ..

I can not figure out how to select all contacts and add them to a group (or filter).

Also I haven`t found where I can add a separate ringtone to a group.

I am from Holland, so if my English is a little dry you know the reason why.