Programmatically creating an action

[HippyCraig]

I am creating a script to modify multiple scripts. I have a loop function that goes in and cycles through all our script files and tries to create a "Write Registry" step in the script, I have the index figured out so its really an issue with recreating the steps through vbscript. I have the following so far:

'Create Sub Call
Option Explicit

Dim objApp, objStep, iNewIndex

Set iNewIndex = Application.Macros(vbldMacroTemporary).Item("TMP_N EW_INDEX")

' create VisBuildPro app object
Set objApp = CreateObject("VisBuildSvr8.Application")
objApp.Project.Load "%PROCFILES_FULLPATH%"

Set objStep = objApp.Project.Steps(vbldStepMain).Add("Write Registry", iNewIndex)
objStep.Name = "VS2013 MSI Project Update"
objStep.Indent = 3
objStep.Checked = False
objStep.Property("RootKey") = -2147483647
objStep.Property("SubKey") = "Software\Microsoft\VisualStudio\12.0_Config\MSBui ld"
objStep.Property("ValueData") = 0
objStep.Property("ValueName") = "EnableOutOfProcBuild"
objStep.Property("ValueType") = 4

objApp.Project.Save

Here is the XML from the Step I am trying to recreate
<step action='Write Registry'>
<RootKey type='3'>-2147483647</RootKey>
<SubKey>Software\Microsoft\VisualStudio\12.0_Confi g\MSBuild</SubKey>
<ValueData>0</ValueData>
<ValueName>EnableOutOfProcBuild</ValueName>
<ValueType type='3'>4</ValueType>
<buildfailsteps type='11'>0</buildfailsteps>
<indent type='3'>2</indent>
<name>VS2013 MSI Project Update</name>
</step>

My question is around RootKey, ValueType, and indent, how do I set the Type paramater and the actual value in my script sample above.

PS using VB 8.7