On the back of the box I meet and exceed requirements.
A 4200 is not better than a 2900 (what's on the box). Let me explain why:
Radeon cards are printed in a 4 digit format: XYZ0. X is the generation (2nd gen vs 4th gen), Y is the major revision (200 vs 900) and Y is the minor revision.
the Y (the second number) is the most important one, followed by the third, followed by the first. For example, a 4890 beats the sh*t out of a 5730. A 3800 would beat the **** out of a 4300. And a 2900 (the minimum) is far better than the 4200.
Passmark score (A benchmarking test for CPUs and GPUs among other things) on a 2900 (the minimum) is around a 500. Passmark scores on 4200 series are under 200. In other words, a 2900 is twice as good as your 4200 can ever dream of being.
So no, a 4200 does not meat the minimum requirements, for that reason.
EDIT: bsphil beat me to it, but I was more detailed in my description. Edited, Sep 24th 2010 8:39pm by Mikhalia