How To: https://portal.datapipe.net/support/dba/sql/Shared%20Documents/SQLPostInstall/How%20To%20SQLPostInstall.docx 
SQL Post Install file: https://portal.datapipe.net/support/dba/sql/Shared%20Documents/SQLPostInstall/DPSQLPostInstall.psm1 

Example:
PS C:\> Import-Module C:\DPTools\DPSQLPostInstall.psm1 -Force
PS C:\> DPSelectTargetInstance
Which Instance will you be running the SQLPost install on today?
1. NJSQL2014TEST01\TEST1  (Running)
2. NJSQL2014TEST01\AG1  (Running)
3. NJSQL2014TEST01\AG2  (Running)
4. NJSQL2014TEST01\AG3  (Running)
5. NJSQL2014TEST01\AG4  (Running)
6. NJSQL2014TEST01\AG12  (Running)
7. NJSQL2014TEST01  (Running)
Enter selection: 1
You've selected NJSQL2014TEST01\TEST1 for the SQLPostInstall
PS C:\> DPSQLPostInstall -Targetinstance $selection


If you get this error while importing the script, set the execution policy to unrestricted
"Cannot be loaded because the execution of scripts is disabled on this system."

PS C:\> Set-ExecutionPolicy Unrestricted