Hi

I notices that ezteamroom installer doesn't add the teamroom siteaccess to the admin siteaccess' RelatedSiteAccessList[] and visa versa
This can have affect on cache clearence I think (editing something in admin will not clear ezteamroom cache)?

I suggest teamroom installer adds ezteamroom adds itself to the admin siteaccess' RelatedSiteAccessList[]. Then it copies that array to the teamroom siteaccess extension itself.
This way, if admin siteaccess is already related to other siteaccesses, teamroom siteaccess will too