LG HT 902PB region hack

[gargamele]

Hi,
I'd like to watch Zone 1 DVDs on this all-in-one LG Home cinema system LG HT 902PB, bought in Spain. Do you know how to hack it?

http://www.tiendaazul.com/tienda/detalle_producto.asp?producto=T2HT-902PB

Thanks for the help!
Gargamele