If the creaks are coming from the doors rubbing, I have put dots of felt - about 3/8" diameter and 1/16" thick on all of the corners and rub points with success.
If the creaks are due to movement of the cabinetry, then you will need to find those rubbing spots and cut or sand the edges of the wood parts to stop the noise.
I have done both and have successfully quieted all of the creaking and squeaking on my 1997 h40.5.