Cheers! Finally, the last question and I won't be spamming this place any more
Apparently OS version spoofing doesn't seem to be covered by KEx. Is there an official, generic way for achieving this (I know, for specific cases - Orca for .msi packages, hex editor for the oddball out there)?
Because, case in point, for Firefox ESR 52.9.0, the installer aborted because it complained that its not running under XP. I remember that at least for WinMe there was an option to spoof the OS version in a way similar to how shims work. I extracted the package and ran FF from there but I'm thinking there might be a more elegant way for some apps than this.
I mean, especially if, say app X requires a specific API function that was added in Win XP but deprecated in Vista or app Y requires a specific API function that was added in Vista but deprecated in 7.
EDIT: Already answered in the previous post.