How can I 'take' Fontaine

Hint 1 of 7:

Have you visited Rachel Akure ?

Hint 2 of 7:

Did you buy something from her ?

Hint 3 of 7:

OFFER cash   $500      +1

Hint 4 of 7:

In Cairo, quickly OPEN DUMPSTER in middle of screen at bottom.

Hint 5 of 7:

Move forward and GOTO DUMPSTER.       +5

Hint 6 of 7:

As Fontaine walks by dumpster, USE DART ON HITMAN.       +10

Hint 7 of 7:

Ask the right question and he tells you about Athens.