Finally php module is functional... when calling php_request_shutdown(), it does seem to throw an exception, which does not make any sense (First-chance exception at 0x77e55dea in ioD.exe: 0x000006A6: The binding handle is invalid.) with both php4 and php5 libraries.
... those of you familiar with c, should be able to extract quite a bit of information from source files that I decided include with this post