To hell with the leagues, they're good fun and all, but we need to have a proper face to face race with the spies!
To which, this mod I stumbled upon comes in perfectly.
The mod in question!
Basically it seems to hook onto the game's code and let you race any car on any stage, and it'll let you do it in multiplayer too, so long as everyone in the lobby has the mod as well.
I'd be well up for giving it a try with people and maybe have a casual cruise up Pike's Peak in some 1970's racers. Or just go all out and have a group B death race in monte carlo.