The installer has to be used carefully because it creates by default a new folder called "Pacific Aces" !!
The most common error is not checking in the installer if the correct path is selected, so when all PA files go into a new subfolder created inside SH2 (And not into the various subfolders of SH2) there is an error when starting PA, or either you still get the old SH2 when using the SH2.exe, because the PA files have in fact NOT overwritten the old SH2 ones, but have been installed to a new folder instead
Check inside your SH2 folder (The one you prepared for PA), and if you see a folder called "Pacific Aces" or "Silent Hunter II" which also has inside "sim", "shell", etc. folders, then you installed it wrong
