bash the doors dawn ya numskull!

i think you have to use the dark jak blast attack

Go near the damage buildings Press L2 and then press R1 for Dark strike. Ialso stuck
hear!!

Go to this page http://www.playstationnotebook.com/JD3/palace.html

Grab your Zoomer parked outside (if it hasn't been destroyed already). If it's not there,
go find one. Fly through the East Slums back into the Northern Section.. Fly all the way
through the streets to the forcefield gate to the Palace area. As you fly close, the
forcefield will evaporate. Fly through the ruins past the mangled wreckage, past the
canal, deep into the rubble. Jump off the zoomer when you're close to the "palace" icon.
Hmmm... no doors or windows. How do you go in?