Use these codes in any teleporter on the relevent level.

Level 1
BBBBBBBB
CCCCCCCC
BBAAAABB
CCACBCBB First spice refinery
CCABACBC Second spice refinery
BABAABBA
ABCBCCAB Hidden rocket site
BACACABA Money fort

Level 2
ABABBABA
BBAABBAA Salt mines
CCBCCACC Diamonds and forcefield

Level 3
AACBCABB
CCBBBBAA