Something like this maybe?

 Code:
shell "c:\scripts\envtscip.exe > %temp%\ipaddress.txt" 
$nul = Open(1,"%temp%\ipaddress.txt")
$ip = ReadLine(1)
$nul = Close(1)
$systems = SubStr($ip,18,11)
$ip = SubStr($ip,18,9)

Select
   Case Left($systems,10) = "10.176.192"
      Shell 'Regedit.exe /S C:\Scripts\USA.Reg'
      Shell 'Regedit.exe /S C:\Scripts\NewYork.reg'
      Shell 'control.exe timedate.cpl,,/Z GMT Standard Time'
   Case Left($ip,8) = "10.80.84"
      Shell 'Regedit.exe /S C:\Scripts\USA.Reg'
      Shell 'Regedit.exe /S C:\Scripts\NY.reg'
      Shell 'control.exe timedate.cpl,,/Z Eastern Standard Time'
   Case Left($ip,8) = "10.78.11"
      Shell 'control.exe timedate.cpl,,/Z Central Standard Time'
EndSelect