Ok now i have the solution,
in fact you don't need any packet writing Software with XPas there is the built-in support for CDRW.
the only problem i had is hmms a micro$oft one. ie
in the cdr properties you have a burner section and you can enable/disable the built-in feature. i uncheked it reboot then recheck and now i can write on CDRW !!
i love that :/