OSD, ADSI Script run fail in WinPE5.1(ADK 8.1)

Question

I want to run ADSI script to check if there is a computer in domain.  If I find this computer account already exists in domain then you can join domain. My script as below.
But it can't work in winpe. it said "Table does not exist" of code "Set objRecordSet = objCommand.Execute". BTW, this script run fine in standard system and the boot image had been
installed all cab plugin(Script,WMI...).
I know it should miss some ADSI related plugin. I want to know how to make this script work or how to check if there is a computer acount in domain. 
strUser="Name"
strPassword="Password"
PcName="Computer"
Const ADS_SCOPE_SUBTREE = 2
Const ADS_SECURE_AUTHENTICATION = &H1 
Const ADS_SERVER_BIND = &H200 
Dim objConnection, objCommand, objRecordSet 
Set objConnection = CreateObject("ADODB.Connection")
Set objCommand =   CreateObject("ADODB.Command")
objConnection.Provider = "ADsDSOObject"
objConnection.Properties("User ID") = strUser
objConnection.Properties("Password") = strPassword
objConnection.Properties("Encrypt Password") = True
objConnection.Properties("ADSI Flag") = ADS_SERVER_BIND Or ADS_SECURE_AUTHENTICATION
objConnection.Open "Active Directory Provider"
Set objCommand.ActiveConnection = objConnection
objCommand.Properties("Page Size") = 1000
objCommand.Properties("Searchscope") = ADS_SCOPE_SUBTREE 
objCommand.CommandText = "SELECT ADsPath FROM 'LDAP://dc=abc,dc=com' WHERE objectCategory='computer' AND Name='" & PcName & "'"
Set objRecordSet = objCommand.Execute
If objRecordSet.PageCount Then
    IsPCname="True"        
Else 
    IsPCname="False"
End If
WScript.Echo IsPCname

Answer 1

Hi,
Johan has a great blog post on how to add ADSI support in WinPE 5 here:
http://www.deploymentresearch.com/Research/tabid/62/EntryId/128/ADSI-plugin-for-WinPE-5-0.aspx
It explains all the steps.
Regards,
Jörgen
-- My System Center blog ccmexec.com -- Twitter
@ccmexec