im pretty new with LFS so i dont really know much. i just started playing LFS for a week so i still have the demo version. do i need to buy a license so i can use my g25???????

no! you can test the full lfs in the demo (well not all cars and tracks but the cars, track, settings and physics that you guys have are exactly the same like in lfs)

no but it would be an great buy it works fine in demo but s2 is worth the money

EDIT: beaten by John