Insert the first disc and from the main menu, select the "Special Features", and then select 'Commentaries'. Highlight the from the "Back" menu entry at the bottom of the screen and then press your Up button to highlight the symbol of a monkey. Press your Enter button now and you get to see a monkeyed-up version of the movie - or at least part of it.
In the "Special Features" menu, select the "Cast & Crew" Biographies' entry, then select 'Cast' and in that screen select 'Estella Warren. In the first page of her biography, press your Up button to highlight the arrow next to her portrait. This will give you access to the actress' first audition tape for the movie. You can also find audition tapes in the cast biographies for Erick Avari and Luke Eberl.
From the main menu, select '"Language Selection"' and highlight the "Resume Film" menu entry. Now press your Right button to highlight the symbol of an ape. This will give you access to the DVD credits.
All easter eggs were generously submitted by SirDonk