Having used @FADL198's codes, I was able to add the McLaren MP4/8 into my garage, and searching from Car ID no.179 one-by-one I found out that the McLaren MP4/8 is...well no.179, so search for any car you wanted to replace with and bash in 179D instead. The F1 should appear.
For MAXPRO, search "179D;5;0;5;0:17" and the next four 5's after a "5-0-0-5" string should be replaced with 10's to PRO it. It's shown below.
As for the other cars, I might do it if I have free time. You can try my method by
1) replacing the Trion Nemesis with the codes FADL198 provided
2) upgrade the car's stats with a number that is easy to look up (i.e. 0-5-4-3)
3) search for the car with the stats you've upgraded with, starting from Car ID 180~184 since only 5 new cars were added.
Example: [ 180;0;5;4;3:17 ], [ 181;0;5;4;3:17 ] etc.