The speed and distance changes worked perfectly. The timer however, did not:
http://i.imgur.com/VeYw8df.png
The script:
http://i.imgur.com/IN6jfGW.png
EDIT: There is also one trap there. I made a test title pack with one solo track, but it was behaving exactly like a multiplayer game. In a normal solo campaign, after you finish a track you get the option to save the replay, improve, and go to menu, but with my test campaign it made me repeat the track again (like in Multiplayer).
Also in the editor the hud went normal again.