Hello Guys and Gals!
This video i show you how to get the "Ice Cool" and "Manual Master" Achievement.
Let's focus on the Ice Cool part though.
Easiest way i found was to start a grand prix from solo in the main menu, Italian GP, 3 Laps (No Quali)..
Make sure Rules and flags are set to "OFF".
When you start (Usually from pole) stay to the left hand side as much as you can to avoid contact with other cars (Use a flashback if you accidentally do though). Once everyone piles into the first corner, you can simply glide straight through, build up a 6-7 second gap immediately, then just be careful going round not to crash!
Hope this helps!