Windows

On Windows, DNS host names can be forced into c:\windows\system32\drivers\etc\hosts 

Assuming you want to map:

one.address.com <= 10.0.0.2

two.address.com <= 192.168.0.1   # Some comment

The following startup script accomplishes this:

echo 10.0.0.2 one.address.com > c:\windows\system32\drivers\etc\hosts
echo 192.168.0.1 two.address.com #Some comment >> c:\windows\system32\drivers\etc\hosts

Translated to a PowerTag script:

!STARTUP_GLOBAL_BAT=echo 10.0.0.2 one.address.com > c:\windows\system32\drivers\etc\hosts^|echo 192.168.0.1 two.address.com #Some comment >> c:\windows\system32\drivers\etc\hosts