How do anonymous corporations function, administratively?

[Jay Hunt]

I am entering into a high-risk business and want to keep my ownership/management private, and separate from my professional/public activities. I am considering setting up an anonymous shell corporation to handle the activities of said business and to hold real estate property ownership.  After doing some internet research on jurisdictions, etc, I feel like I have a grasp on some basic "rules":

-incorporate through a law firm (for client confidentiality)
-incorporate in a anonymity haven, and then open up subsidiaries in the state where you operate

The things I'm not clear on are are how are the mundane (and one large) business operations functions handled, such as:
-who signs a property lease or mortgage paperwork? the lawyer? Usually leases require a copy of someone's photo ID - is that the lawyer as well?
-who signs a contract with a 2nd party/partner (property management company, etc.)?
-who deals with the accountant or bookkeeper for tax filing and corporate doc filing?

Would love advice or to be pointed to internet resources that lay it out, because it seems to be sparse out there...

Thanks!