To make fully unattended install package you need to do following steps:
Download install package: http://www.microsoft.com/en-us/download/details.aspx?id=45015
Extract package content:
CRM2015-Client-ENU-i386.exe /extract:c:\CRM_TEMP\1\2
Do not remove sub folders 1 and 2 from the path, because we need it later
Create Redist folder in c:\CRM_TEMP. Do not put it in the sub folders
Recently one of our customers installed Microsoft Dynamics CRM Outlook add-in and discovered that after this action Microsoft Outlook became absolutely useless, because after start of the program there are no other tabs except Enterprise Vault, which is also used by this customer. Little research showed that the root of the problem is in some components of earlier version of Microsoft Office. To fix problem you need to delete following registry key:
HKEY_CLASSES_ROOT\TypeLib\{2DF8D04C-5BFA-101B-BDE5-00AA0044DE52}\2.4