Iwana is an awsome program, earned me loads of gold. If you're having trouble fishing in high lvl zones (ex: skettis) because you can't get auto-lures, just create this macro and place it on your "1" action bar button:
/cast "LURE'S NAME"
/use "YOUR POLE'S NAME"
/cast Fishing
it will attempt to cast a lure everytime your bot fishes, if you already have one it will ignore and just fish