Incorporating your Power Point template into Quizmaker and Engage

I think the simplest thing would be to customize the color schemes:

You can take the main colors from your corporate template or logo and use it in quizmaker or engage to customize you quiz or interaction's  color scheme.

http://community.articulate.com/tutorials/products/changing-your-quiz-player-s-color-scheme.aspx

http://community.articulate.com/tutorials/products/changing-your-interaction-s-color-scheme.aspx

Here's another tutorial on how to customize an engage interaction that you might find helpful.

http://community.articulate.com/tutorials/products/making-your-engage-interaction-look-seamless-with-your-presenter-project.aspx