Mario Kart 64 Hard Type #4 : Special Cup

I find the races in Mario Kart 64 are too easy to win even the levels 150cc and extra. Almost every time you win the race or you will be second. I have found some gameshark codes that makes the races much harder to win. Here are the codes that i use...Have Fun :) CPU is harder 81163344 FFFF Boost 810F6BA4 439B 810F6BA6 0000 810F797C 43A0 810F797E 0000 810F8754 43A0 810F8756 0000 810F952C 43A0 810F952E 0000 810FA304 43A0 810FA306 0000 810FB0DC 43A0 810FB0DE 0000 810FBEB4 43A0 810FBEB6 0000 810FCC8C 43A0 810FCC8E 0000 Double Points after races 810AC678 25CF 810AC67A 0002 Pinguins are bigger 81167FF8 3E50 81168378 3E50 811686F8 3E50 81168A78 3E50 Do not touch green/red/blue Shells/Star/Fake Box 8108E72C 3C01 8108E72E 4070 8108E734 4481 8108E736 3000 8108C56C 3C01 8108C56E 4070 8108C578 4481 8108C57A 4000 8108EB40 3C01 8108EB42 4070 8108EB48 4481 8108EB4A 3000 TOP4 Positions are unknown (only P1) 8104FDE0 2400