This mod replace some file of liberty city and fixes the city from falling.
Im still working on it and the buildings too, so hard but it's good.
This is beta version for those who cannot wait
put it in: \data\maps\leveldes
Pictures of the new city I started built near Liberty http://imageshack.us/f/707/samp029no.png/ (Its an album, click the right arrow to see more)
I usally play here in SA-MP: