I never played GC , but ,if i remember correctly, Preacher was tellin me how GC's speederbikes floated like 4m in the air , or thereabouts. Why would you want that?
EDIT:
Ooops , thought you meant raise the height of the hover. Nvm.
"Government is the great fiction, through which everybody endeavours to live at the expense of everybody else."
Frédéric Bastiat