php4 and rpm

Hi all well, i'm writing here because i've tried ( unsuccessfully ) to build an rpm with php4, using the included makerpm script. everithing seems correct, but.. the need to rebuild the rpm is because the std redhat rpm has no mcrypt compiled in, and i need it. the question, now, is : knows anybody where to find the mcrypt-compiled rpm , or can someone help me to rebuild the rpm ? i'm starting from 4.0.3 php version , both from source rpm and tarball verision ( the make fail happens in both ) thanks all Fil