Disable modem on AC1900/D7000V2

> [...] D7000V2 [...] Is there a wau to reconfigue it to be able to use
> it as a wireless router within my existing network? [...]

   Your "my existing network" comprises what, exactly?

   What is the actual problem which you are trying to solve?  Would you
like to extend your wireless-network coverage, or something else?  That
is, do you want to use the D7000v2 as a wireless access point (which
would be typical), or as a full-function _router_ (which would be
unusual), or what?

   Visit http://netgear.com/support , put in your model number, and look
for Documentation.  Get the User Manual.  Read.  Look for "Use the Modem
Router as a WiFi Access Point".  (Or, if your really want to use it as a
router, "Set Up the Modem Router for Cable or Fiber Service".)