COFF on Win32 how to try?

[Szymon Gatner via Digitalmars-d-learn]

I would like to try recently merged COFF support on Win32 for a 
hybrid D/C++ application.

Until now I tried that (hybridizing) only with DMD from the 
official installer and in x64 mode.

My question is: how to try the same in 32 bits?