Thank you for your reply,
They are many differences too when accessing or updating xml nodes because of the different dom model in 2007 :
one sample
vbscript / 2003 : appareilCourant.selectSingleNode("./my:DOM_MECA/my:familleFixee").text = "true"
vsta / 2007 : appareilCourant.SelectSingleNode("./my:DOM_MECA/my:familleFixee", NamespaceManager).InnerXml = "true"
regards