Guess I just needed a little more time. . For anyone who's curious, this bit of code will get the SMS IPSubnet property with AutoIT:
$oCPAppletMgr = ObjCreate ("CPApplet.CPAppletMgr")
$oProps = $oCPAppletMgr.getClientProperties
$objSubnet = ''
For $oProp In $oProps
If $oProp.name = "IPSubnet" Then
$objSubnet = $oProp.value
MsgBox(0,"Properties",$objSubnet)
EndIf
Next
A VBScript equivalent can be found on TechNet: http://technet.micro...y/cc180278.aspx