hello people, if someone wants to edit the car's speed from TM1PC. you only have to open the file "TWISTED.exe" with a hexeditor (make sure to have a copy). then you have to go to the offsets:
0x262AB -> Sweet Tooth Speed (Default: 5A)
0x263D7 -> Darkside Speed (Default: 5A)
0x26513 -> Yellow Jacket Speed (Default: 6E)
0x2665B -> Hammer Speed (Defautl: 5A)
0x2679F -> Crimson Fury Speed (Default: 87)
0x268E7 -> Outlaw Speed (Default: 73)
0x26A2F -> Pit Viper Speed (Default: 6B)
0x26B77 -> Warthog Speed (Default: 5B)
0x26CB7 -> Thumper Speed (Default: 78)
0x26E00 -> Roadkill Speed (Default: 78)
0x26F37 -> Mr. Grimm Speed (Default: 7D)
0x27073 -> Spectre Speed (Default: 82)
0x271B7 -> Minion Speed (Default: 73)
The range of values are from 00 to FF
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example (editing mr. grimm top speed)
notice that the maximum speed is 238 unlike TM2 (which is 254)
Sorry for my bad english