Yes, pay off the debts that you are admirably already striving to do, then bank any spare cash until / if you start being pursued by the creditor of debt 1....this allows you some time without pressure to clear 2,3 and 4 fully or to make larger payments to clear those faster if so desired.

Worry about debt 1 when they start to worry or show some concern...if still unpursued by 2012 then you have the statute barred option at your disposal.