Just trying to find out if installing app vault RPM's such as postnuke will efeect existing clients already using postnuke. Same applies for phpBB, will it effect a existing client running Postnuke & PNphpBB?
No, the app vault isnt that advanced yet. Upgrading the rpm will not actually upgrade any appvault packages installed on any domain. This is ugly I know, but the only way to actually upgrade those packages is to backup their data, remove the app, reinstall from the app vault, then restore it.