[SdS]

A few questions about installing aircraft mods. I've installed the Unified Installer, and a few maps along with some campaings/missions. All works well.
Now for my questions, most of the aircraft mods say:

"You will need either SOUND_MOD or MOD-Activator first before you download this"
"you will need wrapper.exe" (I think this is part of the Unified Installer)
"Download > AC_INSTALLER_v3_1.exe "

So what or which of these are part of Unified Installer and which ones to I need to install?
I understand you need either the sound mod or mod-activator (without sound mod), but do I need to install one of those? - or- does the Unified Installer include one or the other. I'm a bit confused?
Wrapper.exe is part of the Unified Installer, Right?
What about the AC_Installer? Install that as well?

Please help. Thanks!