Just wait till the race has ended, the replay is automatically recorded.
At the end of the race, press 2, to give it a name.
1 is resevered for voting in multiplayer.
I made the best replay ever it is like sex. but I don't want to loose it. I need a copy of it but i don't know how to save it as a file so i can put it on a usb or upload it on youtube.
The only way i can watch it is start the game then go to Replays and choose it
I tried every setting possible and tried it on 4 differnet computer and i have not ever got it to work. but everyone else rekons it works fine for them it sucks
Depending on your OS, it will be something along the lines of;
start/ control panel/ sounds & audio devices, then look for recording device.
or if you have a little speaker in your taskbar, right click it and go from there.
EDIT I think Macsy is referring to the sound input within frapps, you could always record it without the audio (you might need an older version of ffraps) and overdub a "soundtrack" of your choice
Yes, I did refer to Fraps. You can change the input by opening Fraps, and then go to the movie tab. Choose the 'Detect best sound input' option. http://www.fraps.com/images/movies.gif