Rogue Squadron 2 (secret ships)
I found some secret ships for the game if anyone is interested. Enjoy.
Naboo Fighter - Complete the all main objectives, 12 Training Rebel Insignias, and find the 2 secret items in the Tatooine Training Mission in all 4 time settings (dawn, day, dusk and night). The secret items are the dragon bones (all 4 time settings), Escape Pod (day only), R2-D2 (night only-destroy a sand crawler), and C-3P0 (dawn & dusk - destroy Jabba's Palace).
TIE Fighter - Complete the all main objectives in the Imperial Academy Heist Mission after stealing the TIE in both time settings (day & night). To steal the TIE, fly to abandoned building and kill the pilot (night), or ion the communications tower and then ion the TIE that tries to flee (day). *Note* It will appear in a remote part of the hangar.
Millenium Falcon - Get Bronze Medals or higher on all 10 original missions.
Slave I - Get Silver Medals or higher on all 10 original missions and 2 bonus missions.
Vader's TIE Fighter - Get Gold Medals on all 10 original missions and all 3 bonus missions.
Another secret ship, notes, and codes
Lamda Shuttle - To play as the Shuttle in Triumph of the Empire and Revenge on Yavin bonus missions, recieve 10-12 gold medals on the 10 normal missions and the 2 bonus missions themselves.
Slave I - the 2 silvers for bonus missions must be the first 2 bonus missions (Death Star Escape and The Asteroid Field).
Vader's TIE - should be 5, not 3, bonus missions.
LIONHEAD - Enter this code and you'll be treated to a black and white presentation of Rogue Leader. To disable it, enter the code again. The joke behind this code was that Lucasarts and Lionhead worked together on the game Black & White.
BLAHBLAH - Makes the Audio Commentary function available in the Special Features Menu without having to earn it.
COMPOSER - Unlocks the Music Hall in Special Features Menu.
EXHIBIT! - Unlocks the Concept Art Gallery in Special Features Menu.
?INSIDER - Unlocks Documentary in Special Features Menu if you haven't done so the normal way.
THATSME! - Unlocks Credits in Special Features Menu if you haven't done so the normal way.
Also, if you think the game is hard now, wait to you unlock the Ace Mode Difficulty in the Special Features Menu (get all 15 gold medals). Not only is it harder, but you can now have access to even harder to obtain Platinum Medals!