Im using the almera gti rad... bit large only just fits, andy_s has primera rad I believe. I was thinking of getting an aftermarket civic rad as they are half size and shud fit quite easy.
mines a primera rad and mounts a bit forward of the bonnet catch which needed to be removed. bonnet pins are used to lock the bonnet and bonnet inside was cut to allow space for it to fit. apart from that it fits really well pics are on my thread