Directions:

Infinite Lives:
First enter JPVI?IJC as a password. This will not give the r2d2 sound.
Then enter RSBFNRL as a password, this will give the confirmation sound.

Note! Any lives lost will still count againt your total lives lost on mission. This will not enable you to get Golds on hard missions, you can just die more.

All Tech Upgrades:
First enter AYZB!RCL as a password. This will not give the r2d2 sound.
Then enter WRKFORIT as a password, this will give the confirmation sound.

Unlock All Levels:
First enter !??QWTTJ as a password. This will not give the r2d2 sound.
Then enter CLASSIC as a password, this will give the confirmation sound.

Unlock Ace mode:
First enter U!?!VWZC as a password. This will not give the r2d2 sound.
Then enter GIVEITUP as a password, this will give the confirmation sound.

Unlock Death Star Escape Level:
First enter PYST?OOO as a password. This will not give the r2d2 sound.
Then enter DUCKSHOT as a password, this will give the confirmation sound.
(supplied by: Serial Thriller)

Unlock Endurance Level:
First enter ?WCYBRTC as a password. This will not give the r2d2 sound.
Then enter ??MBC??? as a password, this will give the confirmation sound.

Unlock Revenge On Yavin Level:
First enter OGGRWPDG as a password. This will not give the r2d2 sound.
Then enter EEKEEK! as a password, this will give the confirmation sound.

Unlock Triumph Of The Empire Level:
First enter AZTBOHII as a password. This will not give the r2d2 sound.
Then enter OUTCAST! as a password, this will give the confirmation sound.

Unlock Asteroid Field level:
First enter TVLYBBXL as a password. This will not give the r2d2 sound.
Then enter NOWAR as a password, this will give the confirmation sound.

Unlock Naboo Starfighter:
First enter CDYXF!?Q as a password. This will not give the r2d2 sound.
Then enter ASEPONE! as a password, this will give the confirmation sound.

Unlock Millennium Falcon:
First enter MVPQIU?A as a password. This will not give the r2d2 sound.
Then enter OH!BUDDY as a password, this will give the confirmation sound.

Unlock Imperial Shuttle:
First enter AJHH!?JY as a password. This will not give the r2d2 sound.
Then enter BUSTOUR as a password, this will give the confirmation sound.

Unlock Tie Fighter:
First enter ZT?!RGBA as a password. This will not give the r2d2 sound.
Then enter DISPSBLE as a password, this will give the confirmation sound.

Unlock Darth Vader's TIE Advanced X1 :
First enter NYM!UUOK as a password. This will not give the r2d2 sound.
Then enter BLKHLMT! as a password, this will give the confirmation sound.

Unlock Slave I:
First enter PZ?APBSY as a password. This will not give the r2d2 sound.
Then enter IRONSHIP as a password, this will give the confirmation sound.

Unlock Car:
First enter !ZUVIEL! as a password. This will not give the r2d2 sound.
Then enter !BENZIN! as a password, this will give the confirmation sound.

Unlock Audio Commentary:
Put in BLAHBLAH as a password.

Art gallery:
Put in EXHIBIT! as a password.

Black and White mode:
Put in LIONHEAD as a password.

Sound test:
Put in COMPOSER as a password.

Documentary:
Put in ?INSIDER as a password.

Credits:
Put in THATSME as a password.

Jango Fett's Slave 1 colors.:
Enter codes in this order:

!??qwttj
classic
pz?apbsy
ironship
vv?gxryp
cnooq!zr
jfettshp

If done correctly, the slave 1 will have Jango Fetts colors from Episode 2. Note! If you already have the Slave 1, you only have to enter the last three codes.