In conclusion, while I couldn't find specific information on the "2013rar" mod for F1 Challenge '99-'02, I hope this general information on mods and the game has been helpful. If you're interested in modding F1 Challenge '99-'02, I recommend searching for mods on trusted websites and forums, and always being cautious when downloading and installing mods.
: Modernized track layouts reflecting the 2013 calendar, often including high-res texture updates to keep the aging engine looking respectable. Refined Physics f1 challenge 9902 mod 2013rar