You might want to consider this...
The wheel offset is crucial for handling as changing the offset will change the way the stress applied by the road to the car is transferred to the suspension.
The most important thing to keep in mind, however, is the front wheels and not only because the car is FWD.
I am going to link a good article, but if you don't want to read through, here's the summary:
there is a distance between the pivot point of the front wheels and the centre of the front tires contact patch. This is called "Scrub Radius". Usually, the SR on a FWD car is negative. This has a stabilizing effect in situations in which one of the front wheels might lose traction, no matter what the circumstances.
It also affects the steering feel and the ability of the driver to control the car.
Reducing the offset negatively affects both the two things I mentioned as it makes the negative SR less negative or even positive, reducing or canceling it completely. Furthermore, it does another 2 things:
1) puts greater stress on some suspension components, thus making it possible that some suspension components which never fail, could fail over time
2) reduces the stiffness of the springs because it changes the leverage favourably for the wheel, which has a better leverage to transfer forces to the springs.
Then, you'd have to seriously look at rubbing issues, especially if you are thinking about a setup similar to those in that thread posted... I can't believe those cars actually are driveable...
Just a little heads up.
For further reading:
Stretched Tire Look, Scrub Radius and Wheel Spacing - Guide To Proper Honda Wheel Offset - Honda Tuning Magazine
Scrub radius: Information from Answers.com
Scrub radius - Wikipedia, the free encyclopedia