Choose this to use the new AOS v2.5.1 "Smart" Installer.
This installer will check for plugins in your load order and automatically select the best install options for you. It is also designed to check for load order configurations that will result in incompatibilites which result in AOS and/or your other mods to not working as expected. However, there are still a few manual choices for you to make -- please read the description texts for more details. In order for installer to work, you MUST have all other mods installed and ACTIVE, because the plugins in your load order will be checked by name. If the "Smart" Installer doesn't work for you, then please use the "Choose options manually" type of installtion.
The "Smart" Installer is NOT recommended to use if you have merged any plugins of other mods, so please use the "Manual" Installer instead. However, please note that most of the AOS compatibility patches refer to plugins from other mods as "masters" which means that the AOS pathces won't work if those master plugins are missing from your load order.