PHP4, NT4 & ODBC

Has anyone else had a problem with ODBC where after installing PWS the Manager and Client report different versions and end abnormally? I'm running Apache on NT (Intranet only) but was toying with moving to IIS/PWS. I changed my mind and removed PWS (absolute pain, it won't disappear and even re-instated the manager & WWW service after a full "Remove All"). PHP4 now hangs saying that the ODBC library files ODBC32.dll and ODBCINT.dll are different versions. A lesson has definitely been learned about not fixing unbroken things but I cannot get out of it - I've uninstalled and re-installed Access97 & Data Access to try to restore compatible dlls but still no luck. Is there anywhere on the MS site where you can download and install just the ODBC stuff? Thanks for any help Derek