Yestarday I installed FC3 through NFS .I wanted to test Mail Scanner with clamav + postfix.While installing MailScanner it said there are no /usr/src/redhat directory.
Don't have all your answers, but on my system that dir. is part of the rpm-build RPM; you may have somehow not got that installed. Try adding that (although you've already created the dirs.) and see if it helps, as it has a load of other build-related files too.
-- [neil@fnx ~]# rm -f .signature [neil@fnx ~]# ls -l .signature ls: .signature: No such file or directory [neil@fnx ~]# exit