This script should disable all enabled wireless network adapters on Vista. It will not work on XP.
If you have XP you could perhaps use vbs to enumerate wireless network adapters and disable them using DevCon.
strComputer = "."
Set objWMIService = GetObject("winmgmts:\\" & strComputer & "\root\wmi")
Set colItems = objWMIService.ExecQuery("Select * From MSNdis_80211_Configuration")
For Each objItem in colItems
strName = objItem.InstanceName
Set objWMIService2 = GetObject("winmgmts:\\" & strComputer & "\root\cimv2")
Set colAdapters = objWMIService2.ExecQuery _
("Select * from Win32_NetworkAdapter Where NetEnabled='True' And Name = '" & strName & "'")
For Each objAdapter in colAdapters
objAdapter.Disable
Next
Next