32 bit ODBC on Windows 2008 64 bits

Hi ! I have a case in which a third party application requires that we use the 32 bit ODBC driver from IBM for Informix, but we want it to run on a Windows 2008 64 bit OS. I have tried to read the release notes and search information on the Internet, but I have only found some postings in which it does seem to work to use a 32 bit driver on 64 bit Windows versions before Windows 2008. The T version for 32 bits is not certified as I understand on the 64 bit version, as the F version is, but it might be possible anyhow. Grateful for any input on this Regards Ulf