Managment may not know what they're asking for here. ;-)

I don't think you'll need to use Poser on this one since you can do all of the animation in Carrara. Iactually  do a ton of that kind of work myself but I haven't come across any specific tutorials (or made any) that specifically covers all of the recommendations. Integrating Carrara with still photographs is no problem and quite fun actually. I posted an example here awhile back. It's really just a matter of using a photo for a background, setting up your scene, eliminating the background from Carrara, rendering and then compositing within Photoshop.

Animating within live footage of a client environment is very possible but it might be a little out of your hardware and software capabilities unless the company wants to trick-out your workstation. It would be easier to create an environment and animate within it instead. 

If you need to animate within live footage, just post back and i'll rough out what you need.