I have bought the same card but I have not received it yet. I would be interested to know how well works for you, specially in games.
No hack needed, you can download the 32 bits driver from the official AMD site:
Select the 32 bits link for Windows 7.
You are shooting yourself in the foot by using a 32bit OS....especially if you are going to play PC games. A lot of the current (and more on the way) games are for 64bit only. If you don't have the ability to upgrade to a 64bit, then install the Windows 10 Preview in 64 bit, and get the free upgrade when it's released at the end of July.
Those drivers are not for the 300 series.
What is wrong with the drivers furnished by MSI?
It is required that you uninstall all previous versions of AMD Catalyst Drivers and Software before installing this version.