Go to the bar in Mos Eisley Cantina and enter the following in the password section:

Admiral Ackbar - ACK646
Battle Droid Commander - KPF958
Count Dooku - DDD748
Ewok - EWK785
Greedo - ZZR636
Imperial Guard - GUA850
Ki Adi Mundi - MUN486
Luminara - LUM521
Padme - VBJ322
Stormtrooper - NBN431
Taun We - PRX482
TIE Fighter - DBH897
Watto - PLL967
Zam Wesell - 584HJF
Zam's Speeder - UUU875