Replace files located here:

[DIR]Grand Theft Auto IV\pc\data\maps\east\bronx_w.img

[DIR]Grand Theft Auto IV\pc\data\maps\east\brook_s.img

[DIR]Grand Theft Auto IV\pc\data\maps\east\brook_s2.img

[DIR]Grand Theft Auto IV\pc\data\maps\east\brook_s3.img

[DIR]Grand Theft Auto IV\pc\data\maps\east\brook_n.img

[DIR]Grand Theft Auto IV\pc\data\maps\east\brook_n2.img

[DIR]Grand Theft Auto IV\pc\data\maps\east\queens_e.img

[DIR]Grand Theft Auto IV\pc\data\maps\east\queens_m.img

[DIR]Grand Theft Auto IV\pc\data\maps\east\queens_w.img

DIR]Grand Theft Auto IV\pc\data\maps\east\queens_w2.img

dont forget to rebuild :)
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need help on moving files either by cleaning the city or moving some items to their right
place like a trolly cart on a Mart not on the beach being used by hobboes 0.0
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thanks to "jpm1" for the tutoral

I Recommended Trying 

"Clean Sea Mod" by jpm1

"Vice City Fish" somewhere in the internet
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check out this Modders

cromchen "http://www.gtagaming.com/downloads/author/cromchen"

Fabriciuz "http://www.gtagaming.com/downloads/author/Fabriciuz"

TLA-9196 "http://www.gtagaming.com/downloads/author/TLA-9196"

