[Freeswitch-users] Mod_nibblebill for CDR billing

From the mod_nibblebill documentation: At the end of a call, the module sets a variable named nibble_total_billed. You can use mod_cdr to record this variable to your CDR log. Is it possible to do the same with mod_xml_cdr? I'm looking for a simple way of billing my CDRs and this one looks like a good solution. Has anyone tried doing anything similar? Thanks, Rogelio