Hola Carlos,
I know is not as elegant as manipulating objects, but, wouldn't it be easier to just use xmltocursor and cursortoxml? I know is cheap, callme scrouge ("Amarrete" is my nickname in EVE-Online :)
"The five senses obstruct or deform the apprehension of reality."
Jorge L. Borges?
"Premature optimization is the root of all evil in programming."
Donald Knuth, repeating C. A. R. Hoare
"To die for a religion is easier than to live it absolutely"
Jorge L. Borges