I don't think you need a driver but I'll check with the folks at Linux Mint-
In the meantime these webpages should be a help-
BTW, I did not know that this was the case:
Compiz 0.9 in Mint 14 is unity optimized
and quite dysfunctional and incomplete in many aspects-
Compiz/vesa issue with Mint 13
I'm trying to enable Compiz effects after installing the fglrx driver,however whilst the driver apparently ... capable of running Compiz, you need to install the proper driver
for your graphics card. These are the ...
Is there anything I can do?
Try installing a driver for your graphics card-
Hope this helps