jmfabio,
What version of Windows are you running?
In Windows 7-8-10 you need to NOT install in default location.
I recommend custom installing into a separate: C:\\Microsoft Games\Combat Flight Simulator 2 (Pristine you don't modify); Once you have this, you can then just copy and paste the entire CFS2 program into you separate and distinct installs and point new Icons to these distinct locations.
C:\\Microsoft Games\Combat Flight Simulator 2\USN;
C:\\Microsoft Games\Combat Flight Simulator 2\USAAC;
C:\\Microsoft Games\Combat Flight Simulator 2\USMC;
C:\\Microsoft Games\Combat Flight Simulator 2\BPF.
Then you can do the same for ETO West - ETO East - MTO - Northern Africa.
Again, Do NOT allow it to install in the newer Windows versions in the default "C:\\Program Files (x86)\Microsoft Games\Combat Flight Simulator 2" location.
Also, once you install, get the NO CD CFS2.exe and replace the original. The above with the NO CD mod will save you LOTS of headaches which the newer Windows create for CFS2.
Also, I would create an ADD-ON SCENERY folder in the C:\\Microsoft Games folder; i.e. C:Microsoft Games\Scenery
As you acquire new scenery just unzip it into this folder and add through the normal CFS2 procedures.
I would definitely get Richard Ludwoise's (Rhumbaflappy) MESH and install it.
Then, MaskRider's various scenery for the Pacific region. Follow his installation instruction to the letter and you will have all of the scenery objects you will need for the Pacific to take on a whole new look.
Then install Uncle Tgt's texture mods to get the vegetation and water looking right.
Sounds like a lot of work, and it is, but WELL WORTH IT!
AND, most importantly, everyone here is super great about helping each other get things right.
Welcome back!!
Devildog73
PS
Open "File Explorer", Right click on the Microsoft Games folder, go to properties, modify permissions to give yourself full control of all folders, sub-folders, and files. THIS WILL ALSO SAVE YOU HEADACHES.