Justin Smith's new contract extension with the San Francisco 49ers features additional guaranteed money for the player, additional 2013 salary-cap space for the team and a clearer picture of the future for both parties.Those are relevant takeaways after getting a peek at the financial details through ESPN Stats & Information.What Smith gets: $9.5 million in guaranteed money. That includes a $6.56 million signing bonus and a $940,000 base salary this year.