Updated for all 32 world champions this is part one of two.
Custom UI's of All Formula 1 world champions letters through A-H. This is part 1 of 2 Made for 1920 x 1080 screen.
Extract the .rar file's to a temp folder or straight to the packages folder.
Otherwise copy the rfcmp file's from the temp folder to your packages folder then open mod manager and install.
Change in the options under user interface.