Intenta esto:
function Remplace()
local SkinTXD1 = engineLoadTXD ( "skins/1.txd" )
engineImportTXD ( SkinTXD1, 1 )
local SkinDFF1 = engineLoadDFF("skins/1.dff", 1 )
engineReplaceModel(SkinDFF1, 1)
local SkinTXD2 = engineLoadTXD ( "skins/2.txd" )
engineImportTXD ( SkinTXD2, 2 )
local SkinDFF2 = engineLoadDFF("skins/2.dff", 2 )
engineReplaceModel(SkinDFF2, 2)
local SkinTXD10 = engineLoadTXD ( "skins/10.txd" )
engineImportTXD ( SkinTXD10, 10 )
local SkinDFF10 = engineLoadDFF("skins/10.dff", 10 )
engineReplaceModel( SkinDFF10, 10 )
local SkinTXD11 = engineLoadTXD ( "skins/11.txd" )
engineImportTXD ( SkinTXD11, 11 )
local SkinDFF11 = engineLoadDFF("skins/11.dff", 11 )
engineReplaceModel( SkinDFF11, 11 )
local SkinTXD12 = engineLoadTXD ( "skins/12.txd" )
engineImportTXD ( SkinTXD12, 12 )
local SkinDFF12 = engineLoadDFF("skins/12.dff", 12 )
engineReplaceModel( SkinDFF12, 12 )
local SkinTXD13 = engineLoadTXD ( "skins/13.txd" )
engineImportTXD ( SkinTXD13, 13 )
local SkinDFF13 = engineLoadDFF("skins/13.dff", 13 )
engineReplaceModel( SkinDFF13, 13 )
local SkinTXD14 = engineLoadTXD ( "skins/14.txd" )
engineImportTXD ( SkinTXD14, 14 )
local SkinDFF14 = engineLoadDFF("skins/14.dff", 14 )
engineReplaceModel( SkinDFF14, 14 )
local SkinTXD15 = engineLoadTXD ( "skins/15.txd" )
engineImportTXD ( SkinTXD15, 15 )
local SkinDFF15 = engineLoadDFF("skins/15.dff", 15 )
engineReplaceModel( SkinDFF15, 15 )
end
addEventHandler("onClientResourceStart", getResourceRootElement(getThisResource()), Remplace)