Disable named pipes with T-SQL

We have multiple hosted clients with each in there own little domain. I'm trying to setup a single DB server to catch reporting from the remote servers. I have to do it via IP.  I want to disable named pipes on the servers when I'm adding the logging script to the individual SQL Servers. Using the configuration GUI is just plain slow.

This is what I have currently to change the "Protocols for <InstanceName>" and the associated registry key.

EXEC master.dbo.xp_instance_regwrite N'HKEY_LOCAL_MACHINE', N'SOFTWARE\Microsoft\MSSQLServer\Client\SNI9.0', 
                               N'ProtocolsSupported', N'REG_MULTI_SZ', N'sm tcp';
GO
--------------------------------------------------------

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\MSSQLServer\Client\SNI9.0]
"ProtocolsSupported"=hex(7):73,00,6d,00,00,00,74,00,63,00,70,00,00,00,6e,00,70,\
  00,00,00,76,00,69,00,61,00,00,00,00,00
"ProtocolOrder"=hex(7):73,00,6d,00,00,00,74,00,63,00,70,00,00,00,00,00

It is failing with  
-------------------------------------------------------------------------------------------------------
Error executing xp_regwrite extended stored procedure: Registry Type Invalid
-------------------------------------------------------------------------------------------------------

The other for SQL Native Client --> Client Protocols doesn't error, but the registry doesn't change either.
 

EXEC master.dbo.xp_instance_regwrite N'HKEY_LOCAL_MACHINE', 
                     N'SOFTWARE\Microsoft\Microsoft SQL Server\MSSQL.1\MSSQLServer\SuperSocketNetLib\Np', 
                     N'Enabled', N'REG_DWORD', 0 ;
GO
--------------------------------------
[HKEY_LOCAL_MACHINE\ SOFTWARE\Microsoft\Microsoft SQL Server\MSSQL.1\MSSQLServer\SuperSocketNetLib\Np]
"Enabled"=dword:00000000
"PipeName"="\\\\.\\pipe\\MSSQL$UNISON\\sql\\query"
"DisplayName"="Named Pipes"

The reg entries are what it should look like afterwards.

Any ideas?