How to modify the performance/upgrade graphs?

Tacoscent

25RPM
Apr 27, 2011
37
0
How can I modify the performance graphs for each of the cars? Specifically I'd like to increase whatever value the Williams has in the engine department. You know where it shows your cars overall rating next to the other cars? And when you go to select an upgrade it will compare your engine to every other engine on the grid, that's what I want to change. I realize its not actually going to change anything, and its just cosmetic but I still want to change it.

Had another question as well, in the car performance files, each car has their own XML and a mercedes XML, is the Mercedes XML just a reference point sort of thing? I didn't modify that xml at all as I didn't know what it did.
 
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