1. Backup your main.scm & script.img which are in directory ..gta san andreas\data\script
2. Replace with these


Till now there is 5 races from me nvknvk in los santos
press hold  sprint on desired number 0 to 4
if you want first person view hold "horn" for 1 sec

remark:
I make all checkpoints with mta san andreas -map editor
and edit (thanks to RUMBLE for little script, and i added mission races) with mission builder
0.33 (Bartoon Waterduck)

IF THERE ISN'T CHECKPOINT go to last bike(oponnent) till hear the sound 
YOU CAN PLAY ANY SURTUR- DC UNIVERSE HERO only on foot is it(can be downloaded from http://moddb.com)


http://geocities.ws/kingsolomon
http://nvknvk.orgfree.com
http://kingsoomon.esy.es



FOR EXAMPLE YOU CAN DOWNLOAD THIS MOD https://www.youtube.com/watch?v=JSSXPtP3Y9E
GTA SAN ANDREAS SUPER POWERS MOD PC

links:

http://www.gtagaming.com/downloads/gta-san-andreas/cleo-mods/2445

CLEO library-http://cleo.li/

or other DC UNIVERSE HERO