Route check - Free Zone ISP getting usage?

[Crowy]

                                                   ______ 
                            +------------+        /     | 
                            |            |       | Free | 
                +-----------+    ISP1    +-------  Zone | 
                |OPT1       |            |     /        | 
          +-----+-----+     +------------+    |---------- 
  ___     |           |                      / 
 /   \    |           |                      | 
| LAN |---+  pfsense  |                      |     Internet 
 \___/ LAN|   router  |                      | 
          |           |                       
          +-----+-----+     +------------+    | 
          |     |WAN        |            |      
          |     +-----------+    ISP2    +------- 
          |                 |            |       | 
          |OPT2+---------+  +------------+        \________ 
          +----+Wireless |
               +---------+

If a PC on the LAN/Wireless requests a data that is in ISP1's Free Zone I want the router to use that Link, for everything else use the link on ISP2.

If the link to ISP1 goes down LAN users should be still able to access data through ISP2, if the link to ISP2 goes down then only the free zones will be accessable everything else will be rejected.

ISP1 is Bigpond Cable(New type that is DHCP only no BPA login/Heartbeat thing)
ISP2 is a Static IP ADSL Connection
LAN is fairly standard 192.168.1.0/24
WLAN is fairly normal 192.168.2.0/24

I have 2 routes in place
LAN 144.135.0.0/16 58.174.14.1 bigpond 2   
LAN 144.140.0.0/16 58.174.14.1 bigpond 1

Now I believe those address ranges are free, trying to get a straight answer out of Bigpond is like getting blood out of a stone, but that's another story.

I'm mainly trying to check that adding those 2 routes is all I need to do, or will I need to put a catch route in to route everything else via the ADSL? Even though the ADSL is the Default Gateway/Route?