Well lets go step by step....
1. In Options|Controls-Buttons 1,2 set your keys for upshift\downshift if you use controler
2. Then Options|Controls-Gear Shift mode set your auto,manual GB
3. When you are in track press Shift+G to change your GB like step 2.
4.If this not helps you RTFM of LFS
As for the setups there are some Road Going set from Bob if I m right.....