This is a Edited OnePiece's HD Dodo.

I simply edited HD Dodo to make HD Skimmer. "Has an bug in the rudder"

His HD Car packs can be found here: http://www.gtaforums.com/index.php?showtopic=303247

GTA SA - HD Dodo & Skimmer: http://www.gtainside.com/en/sanandreas/airplanes/95601-gta-sa-hd-dodo-skimmer