Customisation

Hello
I want make customisations to the WordPress directory website http://www.nationalacweddingshow.
(The website theme uses the Geo Directory Plugin)

CHANGES NEEDED:
Edit Menu navigation set up to be: HOME | CREATE LISTING | FREE SIGN UP | LOGIN | CONTACT
and delete ALL other menu pages.

Replace the MAP on the home page with Picture Images

The website will not be a WEDDING VENDORS directory
I have already filled in the different vendor categories and I will fill in the different business posts listings later myself.

See attached file for better information.

Please let me know if
a) Can you do it?
b) How long to complete
c) Cost

Thanks