sql insert into memberof in AD

Hi,

I am not sure if this is an appropriate group for this question, but does 
anyone know how, or can suggest a good reference sight for doing SQL based

LDAP inserts eg I need to be able to add certain AD accounts to be members

of certain AD groups via SQL. I know you can do things like

@[EMAIL PROTECTED]
'<LDAP://AD Domain>;(&(ObjectCategory=group)(memberOf=' + 
ltrim(rtrim(@[EMAIL PROTECTED]
)) + '));distinguishedName;subtree'
SELECT * FROM OpenQuery(ADSI,''' + @[EMAIL PROTECTED]
 + ''')

but I can't find a good reference site to help me. I also realise that 
memberof is a multivalued field so I don't know if this is going to make
it 
more complicated to achieve.

Thanks in advance
Janette