Hi, i was wondering if someone could make a version of lfstweak for the demo or is there already one that exists that i haven't heard of.

LFSTweak is only for licensed users and I doubt someone will make a demo version of it.

There is nothing preventing developers from not adding licence protection to their apps. For apps that edit the cars, it is a requirement for release at these forums that they contain licence checking. This is simply to prevent demo racers getting more content for free. If you wish to drive more cars, then please buy a licence.

there is the very old version Q,and the tweak is for demo players too.i wont recommend it to you,just stick to the lfs cars as they are,the physics in the newest patch are awesome,and the car feels better than the old Q version