A great car choice ! The S-Chassis might be overrated but it's just too good to not work with !
Also, a little tip, use V-Stanced file hosting, it's just quicker.
On the top right corner there the "my files tab", just press it, make a folder and upload pictures. After that, click on them and copy the url.
Big Smoke explained the rest, so yeah.
Good luck with the RP !
My favorite tool - hammer.
My least favorite car - Hummer.
When my engine blows up - bummer.
My favorite season - summer.
My favorite car - AE86.
(i mean really, love these overpriced old pieces of junk <3)