I am installing DXA 1.6 framework with SDL web8 on production environment and i do not want default DXA website specific any items to be present on prod servers. Like default DXA website, DXA specific Business Process Types in CMS. On Prod I can deploy only my custom website,In CMS I need DXA Master, DXA site Type publications only (will delete other DXA publicaitons) so that i can inherit them in my custom publications. 

In other words how can I skip step1 and step3 which are mentioned in the default DXA installation. Can I directly execute step2 script and for step 1 and step 3 do it manually using Topology commands specific to my custom web application

1)Creating the DXA Topology (ttm-prepare.ps1) - SKIP

2)Installing the content (cms-import.ps1) - Need this to inherit DXA Master, DXA site Type

3)Installing the web-application (web-install.ps1)- SKIP