Well guys i thought i just share with you that through trial and error i was able to answer my question.

here it is :
for the advance info screen to show the correct country the allegiance/country code in the CFS2 country file must match the allegiance number for each aircraft in every mission of the campaign.

the advanced info screen also provides LOCATION of the action. Some time it is missing in add on campaigns or missions. This can be rectified by updating the opareas file in the INFO folder with the longtitude and latitude coordinates of the theater/actions  in question.

I just added the LOCATION for the Finnish campaign as follows: N60.00  E20.00  and N70.00  E35.00 and given it the name of Finnish/Russian Theater; and that is the way it shows up on the Advanced Info screens of each mission.

michaelmichael