ODBC driver (AcuODBC, MS Access Driver)

Answer 1

You probably don't need to download new drivers, you just need to use the 32 bit version of the ODBC administrator found in:

%windir%\syswow64\odbcad32.exe

The ODBC administrator in the control panel is the 64 bit version which won't show any 32 bit drivers. If your application is 32 bit then you need a 32 bit dsn created in the 32 bit ODBC administrator.

Answer 2

If you do find yourself needing to build new drivers, SimbaEngine SDK supports 32-bit applications on 64-bit systems. You can get a free evaluation version of it at http://www.simba.com/evaluate-odbc-sdk.htm. When you fill out the form, indicate that you are interested in a 64-bit Windows solution.