Develop a story for using Razor in an existing environment

Most users already have existing physical environments, provisioned in a variety of ways. Starting to use Razor in such an environment today is, to say the least, difficult.

Issues to address here are things like

• I already have provisioned machines and want to enroll them with Razor so that in the future I can reprovision them more easily. Razor should recognize these machines, but not modify them
• Similar to above, but I'd want Razor to put PE agents on already installed machines without touching them in any other way