I have a team where i try to use the best team and formation, and what i got is:
---------Cech----------
----Lucio-----Stam-----
Zanitti------------A.Cole
-------------Essien-----
-----Gerrard------------
---------------Rosicky--
-Eto'o------------------
--------Bergkamp-------
---------------Henry---
I made it so that the full backs push up often enough, but not leave too many spaces. Essien plays defensive (arrows towards his own goal and def. high) but still as a CM, while gerrard is attacking (arrows towards other persons goal and def. middle). rosicky cuts inside, while eto'o is also attacking (but in RM), so he will make lots of runs to both cut in and out the wing. Bergkamp acts as a playmaker, while henry acts as a left/center forward who makes runs.
Of course, you can't do that because u can't change the teams. So i suggest that for the GK, you use Given. I would swap the CB's with Taylor and ___ (i don't know newcastle's defenders in PES6). I would also swap the RB with Geremi, LB with N'zogbia, or mabye Duff. The defensive CM could be butt, but i think you should convert him into a DM for extra defensive cover. The attacking CM could be Smith or Barton, depending on stats/condition.
For the wings, I would place Duff on the left, and Martins on the right (I know he doesn't play that position, but he is very good there), with milner as a sub. Up front, i would use Smith or milner as the playmaker, and owen as the CF. So it would look like this:
----------Given----------
-----taylor----( )-----
Geremi-----------N'zogbia
-------------Butt--------
------Barton-------------
-----------------Duff----
-Martins-----------------
---------Smith----------
--------------Owen-----
I hope this can help you (even if it only by a bit!) in your tournament. Good Luck!