hey,
is there anyone who can help me adding a spoiler to my XRG E30
any help would be appreciated

here's a link to the skin that has the spoiler that i want but it's fitted to the stock skin i need to put it on my E30 skin

http://www.lfs-tweak.com/2010/11/xr-tuned-xrt-bodykit-for-xrgxrtxrr.html

is that possible ??

It is possible only by alterating vob file (shape of the car),which is not supported by LFS developers,since this is official forum,you won't get any help here. What you are showing are not skins,but vob file modifications,skins are jpg files and are changing car colors only.