I would suggest to use just `ASIN` as Jaikoz does, see http://www.jthink.net/jaudiotagger/tagmapping.html.

There is also a comparisson of Picard and Jaikoz tag mapping at https://docs.google.com/spreadsheet/ccc?key=0AoYQhIuWC-gcdHZwUDM3RGhneGMxSXpEX3pONXd6MWc#gid=0 . This was created to help unifying the tags between the two applications. The document is probably slightly out of date but I think still useful.