just in case any needs this i been stuck at 78.9 also an alternative is to purchase on ebay sd card for $28
http://www.ebay.com/itm/PIONEER-AVIC-F90BT-AVIC-F900BT-AVIC-F700BT-AVIC-F7010BT-GPS-REPAIR-WITH-2011-MAP-/140685197353?pt=LH_DefaultDomain_0&hash=item20c17dc029#ht_2416wt_1185