Since UAC hasn't caused me problems with Windows 7, I prefer to install Poser (as well as all other applications) in Program Files with the runtime in My Documents. Of course, scripts still go in the Runtime that is also created in the Poser application folder.
I understand UAC with Vista was a real pain, but Microsoft made it easy to customize or even disable UAC in Windows 7 (Control Panel / User Accounts / Change User Account Control Settings). With Windows 7, the default is to notify me when programs try to make changes to my computer and don't notify me when I make changes to windows settings. That works for me, so I've not bothered to disable UAC. I want to know when changes are attempting to be made to my computer.
You can set UAC to be more strict so that you are always notified when programs try to install software or make changes to your computer or you make changes to windows setting or disable notifications altogether.
With Poser 9 and Poser Pro 2012 (as well as Poser 10 and Poser Pro 2014), the default for the content runtime was the shared documents folder, but you also had the choice of installing the content runtime in My Documents, Poser application folder, or another location. Since I don't share my computer with anyone, I use My Documents.
I think installing is the same with Poser Pro 11, but I couldn't find a how to install Poser Pro 11 in Smith Micro's Poser Knowledge Base.
As you're then installing the Poser content, you specify whether to install the poser content where you specified the content runtime to be or another location.
Ok then. It's time for chai. My blood (and skin ... even under layers) still isn't used to the cooler weather!