2 ways i know of there is alternitive idea but u would have back up files. explain below
step 1
open series str file using notpad or wordpad.
class = Late Model
difficulty = 5.00000 ---- this can be higher or lower higher is stronger
num events = 10
large series = 1
i run 5 for locals and up to 15 but seen higher as in 20.
2nd step is
[drivers]
best ability = 1.000000 higher stronger cars are
worst ability = 0.9900 lower slower
spread modifier = 1.000000 not what this does
u can play around iv seen them set 2.50000 before
3rd step is most complicarted
u can change setting in ai on tracks but doing this MAKES TRACK MISMACH FOR ONLINE. i have 2 track folders 1 for online 1 for offline swap as i need to i set everthing on ai setting to same normaly 1.300000 as example have ?s feel free ask
