Thank you a lot Karamasovnew, you showed me the right place in cameras.dat files to fix my problem (viewport area). So I copied the values in the viewport area from Cameras.dat in ACM to Cameras.dat in OLC MKII... and all works fine!
Here the new file if you or someone else are interested:
http://www.filefront.com/14107825/CamerasOLC+ACM.dat
Now merge OLC MKII and ACM+MyFilter is not a problem in order to have a CombiMod between these three great mods! Of course, I forget to tell you I have the fantastic OLC's horizon... Life is good
Take care and thank you again for your support...
Take care