Easy win
To win easily, turn off damage and put the laps and the cars down. You can now go backwards and take out the rest of the field. Then, just finish the race.
Competitive races
Note: This procedure involves editing a game file; create a backup copy of the file before proceeding. Use the following trick if you ared tired of having to change the opposition strength (OPPS) at the race menu every time you race at a different track. First, set the OPPS within the game to 100%. For example, if you are racing at Atlanta, go to the Atlanta track folder (/nascar3/tracks/atlanta) and create copies of the "atlanta.txt" and "records.txt" files in the same directory. Open the "atlanta.txt" file, then scroll down the arcane capital letter words such as "TNAME", "SPEEDW", "LENGT". There are only a few lines that you can change without crashing the game:
LAPS: How many laps are in a full length race.
QUAL: How many qualifying laps there are. Do not change the first number. There should be two. The first number is only a place-holder.
BLAP: The average qualifying time for the computer cars, x 1000. For example, if the time is 23.456 seconds, it will appear here as 23456. Find your average qualification time and enter this here to qualify near the middle of the pack.
RELS: Same as opposition strength. If you have both RELS and OPPS at 97%, the cars would travel at 97% of 97% (or 94%) at that track.
Edit files
Note: This procedure involves editing a game file; create a backup copy of the file before proceeding. Enter a track folder. There will be a text file for each track in the format "trackname.txt". Open it with a text editor. Look for the line that reads "CARS". Change both numbers to 44. This will give you 43 cars, which is the maximum for that track. You can now have 43 cars at every track. Also, if their are two pits on the track there will also be a "PIT" and "PIT2" entry. Examine them and you will see a single double digit number. Change these on both lines to 22. This will even out the pits for the track. If not, all the extra cars will pit on the back pit. This makes your pit nice to pit in, but can cause cars on the back pit to jam up. If a jam happens, the race will not end.
Create your own seasons
Note: This procedure involves editing a game file; create a backup copy of the file before proceeding. You can also create your own seasons by editing the ones provided by the game. These will be in the main folder called "nascar3". Look for a file called "nascar.cal". Open it in a text editor. You will see five numbers for each track, for example: 1 3 7 0 0. The first number is the race number. In the example, this would be the first race of the season. The second number is the month of the race. The third number is the day of the race. The meaning of the fourth number is unknown. The fifth number is a "0" for a day race or "1" for a night race. After the number will be the name of the track in all capital letters. Then, the event name appears twice, followed by how many laps you will race in it. Whatever the laps is defined here overrides what is in the .txt file for any track. Then there will be the two image files for used for track information when starting a race.