List all DC in AD-domain and version of its OS

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Please,

how can I list all computers account (its "Name", "DNSname", "Operating
system", "Service Pack version") which are "domain controllers" (DC) in
AD-domain?

I already have this script:
/--------------------------------- 8< ---------------------------------\
' Template:
http://windowsitpro.com/article/articleid/50071/how-can-i-list-all-domain-controllers-dcs-for-an-active-directory-ad-domain.html

Const ADS_SCOPE_SUBTREE = 2
Const InCounterB = True

If Wscript.Arguments.Count < 1 Then
Set objRootDSE = GetObject("LDAP://RootDSE";)
strConfigurationNC = objRootDSE.Get("configurationNamingContext")
LdapQueryS = strConfigurationNC
Else
strDomainName = Wscript.Arguments(0)
LdapQueryS ="cn=Configuration," & strDomainName
End If


Set objConnection = CreateObject("ADODB.Connection")
objConnection.Provider = "ADsDSOObject"
objConnection.Open "Active Directory Provider"

Set objCommand = CreateObject("ADODB.Command")
Set objCOmmand.ActiveConnection = objConnection
objCommand.Properties("Page Size") = 1000
objCommand.Properties("Searchscope") = ADS_SCOPE_SUBTREE
objCommand.CommandText = "SELECT distinguishedName FROM 'LDAP://"; &
LdapQueryS & "' WHERE objectClass='nTDSDSA'"

Wscript.Echo "*** Input LDAP-query is: " & objCommand.CommandText
Wscript.Echo
Wscript.Echo "Next servers are Active Directory Domain Controllers: "

Set objRecordSet = objCommand.Execute
objRecordSet.MoveFirst
i = 0
Do Until objRecordSet.EOF
i = i + 1
S = objRecordSet.Fields("distinguishedName").Value
DomainController = Mid(S,21,InStr(Mid(S,21),",")-1)
DomainController = S
If InCounterB Then
S = CStr(i) & "."
Else
S = ""
End If
Wscript.Echo S & DomainController
objRecordSet.MoveNext
Loop

Set objParent = Nothing
Set objRecordSet = Nothing
Set objCommand = Nothing
Set objConnection = Nothing
Set objRootDSE = Nothing
\--------------------------------- 8< ---------------------------------/

but unfortunately I don't know how to get rest of informations (like
"DNSname", "Operating system", "Service Pack version").
:-(


.