Computer Groups Adding Computers in Bulk

I have two questions here:

1.We use a separate tool to patch our systems. Would like to know if we can we use WSUS only for scanning the environment to ensure the systems are patched. If yes, can you point me to some resources that speak about such a configuration.

2.We intend to create some computer groups in our Windows 2012 WSUS. Is there a way to bulk add computer objects into these newly created group using powershell or other means.

Thanks