The National_helmetpack_part1.zip file you have requested: Skins / National Helmet Pack Part 1 - 7.24mb is not available. Perhaps try browsing all files for the game F1 Challenge '99-'02 and upload any files you want to share or are missing. This is the only information we could locate:
This is a my project for f1 challenge 99-02 national helmets. This pack contains 47 european helmets plus 3 bonus helmets.