Superspotter,
seems a little weird to me since the wingletted 757 is still in a very early fase. You might confuse the TU-204 with a 757 with winglets. I searched the web for information about the aircraft you've named but couldn't find anything about it.
Continental might be the launch customar for the wingletequipped B757-200 and other operators of the 75 also showed interest for the modification.
B.t.w. Certification process will begin within the next few months.
Would be great I you could give me a link where I can find some information about the aircraft you've noticed.
Marcel_MPH