You have to download the 1999 mod for F1 2014 which Thang Nguyen has reuploaded. For an example there will be classic car folders in the cars folder. Download the 2 parts of the 1999 mod first, and then extract all of the folders. Delete all of the folders from cars and interiors expect wi2. Then write c15 to replace wi2. BTW I found out that the 2009 Force India livery was based on 2013 Williams.