New Adventures of Zak McKracken! Please help!!!

[Jurgita]

Hi!!! I am stuck with the guard! In the walkthrough is says that I should use the sleeping draught on the hamburger... now the question is where do I find this hamburger??!! Thank you!!!

[jane]

 Taken from walkthro -

Spoiler

Go to San Francisco, then Seattle. Seattle. Speak with the salesman. Give him your coupon.

[close]

[Jurgita]

I did that and he gave me the Cheese Chest, but this doesn't work with the guard. Am I doing something wrong? Thanks for your help, btw!

[Jurgita]

Oh I got it now!! Thank you!!